Both the euglena and paramecium seen have

belong to the Kingdom Protista. ... This is because Euglena just like plants can make their own foods through chloroplast while paramecium just like animals cannot make own food

Explanation:

i think that the best answer would be c.

tell me if im wrong : )

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.