Answer:
Estimates of the global carrying capacity for the human population depend on resource use per capita.
Step-by-step explanation:
The carrying capacity may be defined as the maximum population that can be sustained by the environment. For the exponential growth, carrying capacity is infinite.
The logistic growth has some limit for the carrying capacity of the population. The resources determines and limit the carrying capacity. The global carrying capacity can be determined by depending ob the resources used by the population.
Thus, the correct answer is option (a).