Question

what is a natural unit consisting of all the biotic and abiotic factors which interact with each other in a given area?
a niche
b environment
c ecosystem
d community

Explanation:

An ecosystem is defined as a natural unit where biotic (living organisms) and abiotic (non - living components like water, soil, sunlight) factors interact in a given area. A niche is the role of an organism in its environment. The environment is the surroundings in general. A community consists only of biotic factors (all the populations of different species in an area).

Answer:

C. ecosystem