Final answer:
Logistic growth assumes populations cannot grow indefinitely due to resource limitations, unlike exponential growth which assumes unlimited resources. The answer is option B.
Step-by-step explanation:
The population growth model that assumes populations cannot grow indefinitely is logistic growth. In the logistic model, as the population size approaches the carrying capacity of the environment, resources become limited, leading to a decrease in the growth rate until it levels off.
The logistic growth model takes into account the carrying capacity of the environment, which is the maximum population size that can be sustained. As resources become limited, the growth rate of the population slows down and levels off.
This is in contrast to exponential growth, where the population grows continuously without any limits as long as resources are unlimited. Carrying capacity is a key concept in logistic growth, representing the maximum population size that the environment can sustain.