When earth is 147 million km from the sun, it is at its

a~ aphelion.

b~ perihelion.

c~ astronomical unit.

d~ ellipse.

What can you guys tell me aboutyellow journalism and the u.s. involvement in the spanish-american war.

How is france’s culture important to its economy

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.