Which of the following is a benefit of introducing a variety of plants into a farm field, or of reviving older “heirloom” varieties of food plants such as potatoes and tomatoes? Select two correct answers.
A. better crop yields
B. protection of genetic diversity
C. reduction of the chance of pests destroying a crop
D. reduction of the amount of land devoted to agriculture

i believe you meant to say air rather than hair so the answer is below ")

the dead sea, the lowest place on earth at 430 metres (1,410 ft) below sea level, has a correspondingly high typical atmospheric pressure of 1065 hpa.

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 answer would be d : p

voluntary muscles are controlled by the cerebellum.