Land, air, water

Light, temperature and rainfall

Plants, animals and microbes 

All the above

Autotrophic

Saprophytic

Parasitic

None of the above

Producers only

Producers and consumers

Consumers only

Decomposers only

Green plants and animals

Green plants and decomposers

Producers and consumers

Green plants, animals, decomposers and abiotic environment

On trees

On lands

In water

Both in land and water

Producer

Primary consumer

Secondary consumer

Tertiary consumer

Deers, giraffes, cows

Goats, rabbits, horses

Insects, snails

All of these

One-ten levels

Ten-twelve levels

Eight-ten levels

Three-four levels

Multidirectional

Unidirectional

Bidirectional

Circular

Heterotrophs; Producers

Carnivores; decomposers

Heterotropes; decomposers

Producers; decomposers