According to the online content article about the Sun, the Sun sustains life on Earth by A.
providing light, heat, and energy
B.
revolving around the Earth
C.
causing solar eruptions
D.
harming the Earth’s biosphere

Brazzaville and kinshasha, luanda,librevilleand and monrovia.

Geothermic gradient is the rate of increasing temperature with respect to increasing the depth in the earths interior. away from tech tonic plates boundaries, it is about 25-40 c/km (72-87 degrees f/mi) of depth near the surface in most of the world.