Question

how can we say that human and animal are directly or indirectly dependent on plants​

Answer 1

Explanation:

here is your answer

• Humans and animals are dependent on plants directly or indirectly for food. Only plants are autotrophs i.e., they are capable of synthesizing their own food. Animals are heterotrophs i.e., they are incapable of synthesizing their own food. ... The man also being a heterotroph, gets his food from plants as well as animals.

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Answer 2

it's true that human & animals are directly Or indirectly dependent on plant because only plants are Autotrophs which are capable to synthesise their own food by the process of photosynthesis.