The cells in the skin of your hand are [ bigger than / the same size as ] the cells in your heart.?

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 cell cycle is the final answer! : )

b.have there own function.