Question

Who is a consumer and who is a producer

Answer 1

A Consumer is a person who buy goods and services
A Producer is a person who manufact or produce goods and services
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Answer 2

Producer in the real world of biology are those living organism that depends on no one and rather produce there own food.

For eg: {Plants).

Whereas, consumers are those species who must eat something else, which is not produced by them to stay alive.

For, eg, insects, birds or similar species as well.