The greenhouse effect is the
a. movement to reduce pesticides.
b. hole in the ozone layer.
c. increase in earth temperature due to trapped gases.
d. decrease in earth temperature due to escaping gases. select the best answer from the choices provided

The correct answer is c. increase in earth temperature due to trapped gasses.

Some of the gasses that go up in the atmosphere partially decrease the cooling of the Earth, or better said they trap the warmth in our atmosphere. These causes increase in global temperatures. The more of this gasses in the atmosphere the more increase in temperature. 

H=   2(area/a+b)h= 2(144/a+b)h= 2(144/18+18)h= 2(144/36)h= 2(4)h=8

Ansradar; im guessing here; good luck : )