2. What happened to the average amount of Dead Zone from 1990 to 2015?
a.) It increased.
b.) decreased.
c.)It stayed the same.

3. what happened to the average surface temperature of the water from 1990 to 2005 to 2015?
a.) lt decreased, then increased.
b.) it increased, then decreased.
c.) it only increased.
d.) it only decreased.

4.) what is one possible reason of the average water clarity decreased from 1992, 2015?(hint to go back and reread page 2 of this lesson)
a.) a change in the amount of water
b.) list deposits from runoff.
c.)eutrophication
d.) a change in the amount of oxygen in the water.