danielle's family is justifiably worried that her excessive use of a "downer" will lead to an accidental overdose and death. it further worries them that she often takes the drug with alcohol. which drug are they probably concerned about?

a. marijuana

b. amphetamine

c. phencyclidine

d. barbiturate

I believe it’s a or c

the answer is tropical areas. the tropical areas obtain more

radiant energy from the sun than they lose to space through terrestrial

radiation, and vice versa for polar areas. earth has an energy remaining in the

tropics and an energy scarcity for the polar areas.

explanation:

the most common type of reef is the fringing reef. this type of reef grows seaward directly from the shore. they form borders along the shoreline and surrounding islands.