In comparing an oak tree with a maple tree, you can correctly say that
a. acorns are good to eat, while maple seeds aren't.
b. unlike oak roots, maple roots often invade water lines.
c. both maple and oak trees lose their leaves in the fall.
d. oak is often used to make ships, while maple is often used for furniture.

cramming before a final is bad because it makes a student's stress level higher. students who embrace cramming to get through a final exam week find themselves struggling to perform consistently, once the brain adjusts to prolonged sleep deprivation.

as resources become scarce because of population growth, the growth decreases after few years due to lack of resources and food.