PLEASE HELP Which diagram best represents an economic problem facing Pacific South America? O A. Urban centers have grown rapidly. Populations in general are falling rapidly. ОВ Oil production has increased Indigenous people are more likely to be poor . Oc Economic growth has improved Fewer children are attending school. O Few citizens have access to education. Most countries in the region remain poor.

What is the general rule about surface currents? cold water flows along the ocean floor towards the equator. the east coasts of continents have cold surface currents, and the west coasts of continents have warm surface currents. seasonal and constant offshore winds create significant upwelling along the west coasts of south and north america and africa. the west coasts of continents have cold surface currents, and the east coasts of continents have warm surface currents.

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.

Ozone in the upper atmosphere has been depleted by a. sulfur dioxide. b. chlorofluorocarbons. c. carbon dioxide. d. oxygen.