Wasp pollinating a plant in exchange for food is an example of group of answer choices a) both a service mutualism and a habitat mutualism b) both a service mutualism and a trophic mutualism c) both a habitat mutualism and a trophic mutualism d) only a trophic mutualism

answer: that would be cheating

explanation:

the answer to your question is:

c. complementary base-pairing

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.