What is the primary function of moons in our solar system?

The primary function of moons in our solar system is that they orbit planets and are classified as natural satellites. This implies they are celestial bodies that travel in a path around a planet, held in place by the planet's gravitational pull. This orbital relationship is essential for understanding the dynamics of celestial mechanics within our solar system.

While moons do play roles that might relate to other options, such as influencing tides on Earth or reflecting sunlight to appear bright in the night sky, their fundamental nature is as satellites of planets. This distinction is what primarily defines them, highlighting their relationship to the planets they orbit rather than any other characteristics they may have.