Question

a(n) ________ is a collection of all of the abiotic factors and biotic factors in an entire region. a habitat b ecosystem c community d ecological niche

Explanation:

An ecosystem encompasses all biotic (living organisms) and abiotic (non - living components like water, soil, climate) factors in a region. A habitat is the natural home of an organism. A community is only the living organisms in an area. An ecological niche is the role an organism plays in its environment.

Answer:

B. ecosystem