What type of bone tissue makes up the majority of the vertebral body

if you want more explanation I can add to it

Explanation:

the spongy or cancellous bone tissue

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.

maritime tropical may be your answer.