What is your astrological sign? I’m bored

What noticeable trend from this graph might be used to make a conclusion?

The greenhouse effect a. something that has occurred for millions of years b. an unnatural phenomenon caused by humans that maintains earths temperature range. c. the results of the differences in the angle of the suns rays d. an unnatural phenomenon that causes heat energy to be radiated back into the atmosphere

Which of the following explains why a tree is often used as a model to represent the principle of common descent