Which statement best describes how heat is transferred by convection currents in the atmosphere?
A. Higher energy air particles rise and lower energy air particles sink.
B. Energy is transferred from particle to particle as they collide.
C. Changes of state in the atmosphere absorb and release energy
D. Energy is transferred as long wavelength electromagnetic radiation.

Choose one correct answer.''

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Explanationhjkg:

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.

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.