What is a main cause of acid rain in Europe? A. trains
B. cars
C. factories
D. fertillizers

Explain: plate tectonics and people.

Impressions of tropical swamp plants were observed on rocks in polar regions. the impressions were dark black imprints, which means the fossils are examples of ( 1 ) the fossils tell us that polar regions ( 2 ) ( 1 ) a. carbonization b. mineralization c. trace fossils ( 2 ) a. had tropical plants that can grow in ice b. might have had a diffierent climate in the past c. will have abundent vegitation

What body of water is the second cataract of the nile river submerged under