Final answer:
Active hyperemia is the increased blood flow in response to increased metabolism. It helps meet the metabolic needs of specific tissues. Hence the correct answer is option D
Step-by-step explanation:
Active hyperemia refers to increased blood flow in response to increased metabolism. This occurs when tissues have an increased demand for oxygen and nutrients due to increased activity or metabolic processes. It is a localized response that helps meet the metabolic needs of the specific tissues.
Hence the correct answer is option D