Question 31 (1 point) ✓ saved
state the dependent variable in the following hypothesis.
if a thin tipped pen is used to write the alphabet, then more letters will fit on one
page.
number of letters fitting on a page
type of pen tip
color of ink
question 32 (1 point)
— saved

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 answer is c.mitochondria. glad to .