Pretend that you are writing a scientific paper and wish to cite the Harbor Seals article. Write the citation in two ways: a. as it would appear in the discussion section of your paper
b. as it would appear in the bibliography or reference section of your paper

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 dark variety, as they are not visible on the dark tree barks

explanation:

the answer is 100% density i've answered this question before and done the quiz myself.