Conjunctions  : - A  conjunction is a word or phrase that connects words, phrases, clauses, and sentences together. The word and is a commonly used example of a conjunction. Here are two examples of how we can use a conjunction like and in both a simple and complex way:

• The flower is yellow and white. (connects two adjectives)
• The flower is yellow, and it has a particular smell. (connects two sentences)

Conjunctions are useful in writing and speech to connect related ideas together, and they help us make our sentences shorter, less repetitive, or less confusing.

Subordinating Conjunction: They are used to connect two groups of words or two statements, one of which is dependent on the other. Some subordinating conjunctions are though / although, since, after, till / until, as, because, before, if, while, when, whether, lest, as if, as soon as, as long as, as though, than,etc.

They join a Subordinate Clause to a Principal Clause and help in the formation of complex sentences.

Example : - Stay here till I come back. Here , till is used to connect two groups of words or two statements, one of which is dependent on the other .

In the question : -

1. We can’t go to the mall __________ our car broke down. In this sentence , because is the correct subordinating conjunction that can be placed in the blank part as it is used to show used to show a short reason or explanation, especially when you think the reason or explanation is obvious .

2.___________ he was tired, he agreed to help me out. In this sentence , though is the correct subordinating conjunction that can be placed in the blank part as it used to introduce a statement in a subordinate clause which contrasts with the statement in the main clause .

3. ________ she finishes the work given, she cannot go home. In this sentence , unless is the correct subordinating conjunction that can be placed in the blank part as it used to say what will or will not happen if something else does not happen or is not true .

Thus , the Correct Option is B , which is  Because , Though , Unless .

Conjunctions  A conjunction is a word or phrase that connects words, phrases, clauses, and sentences together. The word and is a commonly used example of a conjunction. Here are two examples of how we can use a conjunction like and in both a simple and complex way:

• The flower is yellow and white. (connects two adjectives)
• The flower is yellow, and it has a particular smell. (connects two sentences)

Conjunctions are useful in writing and speech to connect related ideas together, and they help us make our sentences shorter, less repetitive, or less confusing.

Subordinating Conjunction:

They are used to connect two groups of words or two statements, one of which is dependent on the other. Some subordinating conjunctions are though / although, since, after, till / until, as, because, before, if, while, when, whether, lest, as if, as soon as, as long as, as though, than,etc.

Subordinating conjunctions join the main (or independent) and subordinate (or dependent) clauses together.

In the question : -

1. _____ it is sunny tomorrow, we can go to the park.  In this sentence, the correct subordinating conjunction that can be placed in the blank part is if as it is used to " in the event that":

2. __________ the light came on, we all shouted with joy. In this sentence, the correct subordinating conjunction that can be placed in the blank part is Once as it is used to show " at the moment when" .

Thus , the Correct Option is A , which is If , Once .

Bristol has two football stadiums  whereas  Mumbai has a Rugby stadium. 

Here, conjunction whereas, is used to given reason for the first sentence.

Conjunctions: A conjunctions is a word used to join or connect words, groups of words, phrases, clauses or sentences.

Subordinating Conjunction:  They are used to connect two groups of words or two statements, one of which is dependent on the other. Some subordinating conjunctions are though / although, since, after, till / until, as, because, before, if, while, when, whether, lest, as if, as soon as, as long as, as though, than,etc.