Compared to earth's average climate throughout history, earth's current climate is
a. cooler
b. warmer
c. about the same

Compared to Earth's average climate throughout history, Earth's current climate is warmer. The correct option among all the options given in the question is option "B". This phenomenon has occurred due to global warming. Global warming is taking place because the pollution level is increasing with each passing day. Air pollution is damaging the ozone layer of our earth and this is one of the reason behind a warmer Earth.

In order to help the student expand his/her knowledge I will help answer the question. This in hope that the student will get a piece of knowledge that will help him/her through his/her homework or future tests.

Compared to Earth’s average climate throughout history, Earth’s current climate is warmer. This is due to the fact that we spend many years polluting the earth. As a result global warming is affecting the earth slowly changing climate. The correct choice is letter 

B. Warmer

I hope it helps, Regards.