How does the excretory (urinary) system help the body maintain balance (homeostasis)? A. It produces white blood cells to protect the body from infection.

B. It regulates metabolism for digestion by secreting hormones.

C. It removes waste from the bloodstream through kidneys.

c. it removes waste from the bloodstream through kidneys.

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.

the question isn't complete here so i can't right an answer '_'