Answer:
C. The maximum number of individuals of a particular species that an environment can support
Step-by-step explanation:
Picture a graph, a logistic function, it's called, where it levels off at a horizontal asymptote in the positive quadrant. That's a visual representation of the carrying capacity. It's the maximum population the environment can support.
Clearly, there are limits to this. Scientists wonder what Earth's carrying capacity is, and if/when we will exceed it.