Question

which best explains why the sun maintains its size and shape?
a. pressure caused by high temperatures are balanced by gravity.
b. the sun burns from its core to its surface.
c. forces exerted by orbiting planets cause the sun to rotate.

Explanation:

The sun maintains its size and shape due to hydrostatic equilibrium. The outward - pressure from high - temperature gas (resulting from nuclear fusion in the core) is balanced by the inward pull of gravity. Option B only describes the burning process, not the size - maintaining factor. Option C is about the sun's rotation caused by planets, not its size and shape maintenance.

Answer:

A. Pressure caused by high temperatures are balanced by gravity