Gangrene is a life-threatening condition that results due to a. the death of cells and tissues. b. too much blood supply to affected cells. c. too much oxygen to affected cells. d. thinning of the blood.

Hello

the answer is a because with gangrene take all the nutrients away from cell thus causing them to die

answer: the answer is b

and after water is usually warmed by the sun the water temperature raises and then evaporates .