Decribe the effect of translating abc to a’ b’ c’

According to the earth science reference tables, during which geologic time period were the continents of north america,south america, and africa closest together?

In the late 1990s, brazil’s poor people protested about crowded cities land distribution mining permits industrial pollution

What evidence does the writer give to support his argument about coral reefs? a) he speaks of the activities of coral polyps. b) he describes the composition of the great barrier reef. c) he emphasizes the ways in which coral reefs are fragile. d) he points out the ways that scientists do research on the reefs.