Salut aidez moi svp c'est très urgent

Characteristics of substance farming include all of the following except

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

Describe the four major spheres of the earth system; identify the parts of the earth they each represent. explain what is meant by the "earth system."