Final answer:
d) The belief that people can adjust to the physical environment and choose from various alternatives. Possibilism in geography is the belief that people can adjust to the physical environment and choose from various alternatives.
Step-by-step explanation:
Possibilism in geography is the belief that people can adjust to the physical environment and choose from various alternatives. This theory suggests that while the physical environment can influence human actions, it does not set absolute limits on them. Instead, people have the ability to adapt and make decisions based on the opportunities and constraints presented by the environment.