Suppose you want to take pictures of your friend's soccer game. you'll be preparing your camera. how should you do it?
a) set the aperture to the largest opening.
b) set it at a low shutter speed.
c) load it with a fast film.

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.

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