Cell specialization is important during the growth and development of a multicellular organism. This process is most directly regulated by _.

enzyme speed up the reactions

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.

meiosis is the correct answer