Adaptation: inherited characteristics of a species that develops over time in response to an environmental factor that enables the species to survive
A lack of movement creates swelling<span> in Barbara's </span>legs<span> because the body relies on pressure </span>created<span> by the </span>movement<span> of muscles to circulate the blood which then moves it back up into the heart. Barbara's arms didn't swell because she is more likely to move them in a car than her </span>legs<span>.</span>
Answer:A
Explanation:becausde it explains it that way
