Experiments on Osmosis are often carried out using potato cylinders. You have been asked to find out if sweet potato or bread
fruit would be a good alternative​

ask your teacher

Explanation:

for the answer

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.

within 30 of the equator hope this