Final answer:
The human population has followed a logistic growth curve. Initially exponential, but eventually levels off and slows down due to limited resources.
Step-by-step explanation:
The human population has followed a logistic growth curve. Initially, the population grows exponentially, doubling in size over time, but eventually, it levels off and the growth rate slows down as resources become limited. This is represented by curve B in the graph. It is important to note that while the population growth has been exponential in recent history, it is not strictly following a logistic curve due to factors such as technological advancements and other dynamical factors.