Question

what is defined as \the maximum species population an environment can sustain indefinitely?\
environmental conditions
carrying capacity
breeding patterns
severe precipitation

Explanation:

The question is about a concept in ecology (a subfield of Biology, which is under Natural Science). The definition "the maximum species population an environment can sustain indefinitely" matches the concept of carrying capacity. Environmental conditions refer to the surroundings' state, breeding patterns are about reproduction methods, and severe precipitation is a weather event, none of which fit the definition.

Answer:

B. carrying capacity