20
If we think of the human body as a system, how does eating food relate to feeling hungry and to the digestive system?
A. Eating is only an input for the digestive system.
B. Eating is a feedback between hunger and digestion.
C. Eating is the purpose of the human body system.

answer: c

explanation:

i'm thinking (a) to keep sand in place; ////////////

explanation: a sand fence or sandbreak, like a snow fence, is used to force windblown, drifting sand to accumulate in a desired place. sand fences are employed to control erosion, sand dune stabilization, keep sand off roadways, and to recruit new material in desert areas.

lysosome is this part of the cell is surrounded by a very thick outer membrane to protect the rest of the cell from its strong enzymes.