Anemia is a disorder where there is not enough hemoglobin in the blood. Why would this disorder lead to shortness of breath?

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.

name and explain one of the event that occurs during meiosis that increases the variation in offspring even more than simple reproduction?