a group of organisms that depend on one another in a local environment is called .

A . a habitat .

B . an economic system .

C . an ecosystem .

D . a civilization .

Describe how gravity and convection work together to move the plates in the plate tectonics theory

Lava and other matierls luanced from a volcano and into the air are referenced as

Which best describes the purpose of the south carolina exposition and protest, which was written by john c. calhoun? a) to explain why the south was nullifying the tariff of 1828 b) to describe the ways the tariff of 1828 would southerners c) to persuade northern states to rebel against the federal government d) to ask england for if the south decided to secede from the union