Our weight thermostats are somewhat flexible and are influenced by psychological as well as biological factors. Some researchers have therefore adopted the term

A) plasticity.
B) homeostasis.
C) body mass index.
D) settling point.

The term "settling point" captures the idea that our weight is not strictly controlled by a biological set point, but rather can vary within a certain range depending on environmental, social, and psychological factors. This concept suggests that our weight is more flexible and adaptable than previously thought, and can be influenced by factors such as stress, diet, and activity level. Option A, plasticity, is a more general term that refers to the brain's ability to change in response to experience, and is not specific to weight regulation. Option B, homeostasis, refers to the body's ability to maintain stability and balance in different physiological processes, including temperature and blood sugar levels, but does not specifically address weight regulation. Option C, body mass index (BMI), is a numerical measure of body fat based on height and weight, but does not explain how weight is regulated or influenced by psychological factors.