Match the stages of development with the appropriate week of pregnancy.

Fetus begins movements called quickening.
At this point, the chance of a miscarriage decreases.
The pregnancy is considered “at term” at this point.
At this point, eyelids and ears are forming.
At this point, lungs begin to produce surfactant.

20 weeks - Fetus begins movements called quickening

12 weeks - At this point the chance of a miscarriage decreases

38 weeks - The pregnancy is considered at term at this point

8 weeks - At this point eyelids and ears are forming

24 weeks - At this point, lungs begin to produce surfactant

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.