Which statement about solar radiation is true? A. It is responsible for plate tectonics.
B. It is the source for most of the world's electricity.
C. It travels through space by the process of convection.
D. It supplies most of the energy affecting Earth's climate.

Two grizzly bears are fighting over a fish to feed themselves. what kind of interaction is this scenario, which works as a limiting factor in the bears' survival? a. apparent competitionb. interference competitionc. exploitation competitiond. mutualism

Which best expresses the radical republican philosophy of reconstruction? a. the confederate states were conquered territories that should be ruled by military governors. b. the southern states actually never left the union. c. if ten percent of the voters of a state that had seceded took an oath of allegiance to the union, then it should be readmitted as a state.

Which idea is central to democracy in the united states? everyone has an equal right to consumer goods. people should not compromise to settle differences. the minority has authority over the majority. freedom must be balanced with respect for the law.