Final answer:
A) Dietary. The correct answer is Dietary. Humans can be either vegetarian or non-vegetarian, which is an example of dietary specialization.
Step-by-step explanation:
The correct answer is A) Dietary. Humans can be either vegetarian or non-vegetarian, which is an example of dietary specialization. Dietary specialization refers to the specific food choices and eating habits of a species or individual. In the case of humans, their choice to follow a vegetarian or non-vegetarian diet is a personal decision influenced by factors such as health, ethics, religion, and environmental concerns.