The move from the was a factor which led to the energy crisis, because opec began to price a barrel of oil against gold.
a. gold standard
b. fluid exchange
c. global currency
d. fixed exchange

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.

Which season has the least amount of rain in the northern latitudes

Which of these has the least impact on the climate of a place