The u. s. is considered the melting pot of the world because many cultures have blended together many ethnic backgrounds are represented many languages are spoken many religions are practiced pick more then one

The answer is filtering so c

The sunlight has affected it beacuse its always so hot so they dont get much rain so a lot of their crops and stuff dry out.living things effect it somewhat bye and not a lot of the animals are goind extiect due to lack of food and water.