In what ecosystem have many organisms adapted to a changing salt content in the water? A. intertidal area
B. estuary
C. swamp
D. salt marsh

intertidal area

Explanation:

During exercise, blood pressure, pulse and respiration increase to meet the increased demand for oxygen and nutrients by your musculoskeletal system. The adjustment of vital signs to match your body's level of physical activity is an example of homeostasis in action.