What two products form most of central africa's export income?

What's erosion? a. the breakdown of rock into smaller pieces b. the removal of weathered products from rock c. a change in rock resulting from exposure to water d. a chemical change in rock that weakens it

If the distance between two points on the ground is 10 miles and the distance between the same two points on a map is 4 inches, what is the map scale expressed as a ratio?

Brazilians, like the u. s., communicate directly and you have to be careful with the use of slang. their communication style is a. low-context b. high-context