Tree-planting helps to __________ water and prevent soil erosion.
A. use
B. save
C. reserve
D. conserve
When a dog or other animal ________, it makes a low noise in its throat, usually because it is angry.
A. growls
B. barks
C. roars
D. snarl
A ___________ issue causes a lot of disagreement or arguments.
A. joyous
B. obvious
C. contentious
D. pretentious
If someone or something_________ a point or problem, they emphasize it or make you think about it.
A. highlights
B. specifies
C. defines
D. spots