The graph below shows the average daily temperature over the period of a year. explain how each labeled section of the graph relates to the four seasons.

Remark
I'm going to assume you are in the Northern Hemisphere. 

Answer
A looks like you are beginning in Winter. The temperature is down quite a bit. That would be about October where I live. B is spring because the temperature is rising but not at it's peak. That would be about April May here. 

C is summer. Glorious warm summer. June July and August.

D is autumn. The temperature is falling and it is just about at it's low peak again. 

The american colonies would have been ruled by a king.