Question

How does the climate of the Northeast affect the people, animals, and plants that live in there?

Answer 1

If you know the general temperature of the area this is an easy problem. 
If you connect the kinda of climate that area is (example: tropical=sunny-warm, palm trees).

 So, the Northeast's affect on the people would be they have to deal with cold winters.
Animals' food supply changes a lot with the seasons.
Tree drops their leaves to survive the lack of water. 

Hope this help!