Explain the decreasing trend in HIV cases from the late 90's to 2016 (Site 1)

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

Why is terracing used in southeast asian agriculture?

Which country in the video has the highest population growth rate?