One advantage of is that the nutrients within the soil are replenished.

a.
clear-cutting

b.
acid rain

c.
controlled burning

d.
eutrophication

Which of the following areas has the highest population density?

Which of the layers of the earth has the following three characteristics? i. it is made of molten rock. ii. it has currents that are constantly moving. iii. earth’s plates float on top of its currents.

Find the coordinates of a if b(-9,-10) is the midpoint of ac and c has the coordinates of (-1,9)