Question

multiple-choice question
which of the following is a good definition of \carrying capacity\
how much food a species can eat.
how big the environment is so it can hold more organisms.
the habitat the species lives in.
the maximum number of a species that the environment can support.

Explanation:

Carrying capacity refers to the maximum number of individuals of a species that an environment can sustainably support over time. It is not about the amount of food a species can eat (which is more about consumption), the size of the environment in a general sense (it's about support for a species), or just the habitat (habitat is part of what influences it but not the definition).

Answer:

The maximum number of a species that the environment can support.