Please help me Heat travels in slow convection currents of solid materials within Earth's mantle. Heat that rises in these currents
A. is a by-product from the decay of Earth's radioactive isotopes.
B. is provided externally by the Sun.
C. is a by-product of frictional forces between Earth's tectonic plates as they slide past one another.
D. is provided externally by gravitational energy in the Solar System.

Which statement describes why the us forest service is important a-it protects ecosystems, supervises public access of lands, and manages wilderness areas. b-it supervises public access of lands, manages wilderness areas, and enforces federal wildlife laws. c- it manages wilderness areas, enforces federal wildlife laws, and foreign governments with international conservation efforts. d- it enforces federal wildlife laws, foreign governments with international conservation efforts, and protects ecosystems.

People make choices about how to use resources.

3ways , explain how advance technology affects the word population