Why would increased levels of greenhouse gases contribute to higher temperatures on earth

Some fossils provide evidence to suggest that earth's climate has changed over time. which information can scientists obtain from these fossils? check all that apply

Can someone me? i need to have this done as soon as possible! i'm putting 20 points on this!

The english language is part of which language family? a. alatic b. dravidan c. indo-european d. khoisan