Homonym: gravity (Seriousness)
Gravity is a natural force that pulls objects toward each other. It is what keeps us grounded on the Earth and makes things fall when dropped. For example, when you drop a ball, it falls to the ground because of the Earth's gravity. The strength of gravity depends on the mass of the objects and the distance between them.
In space, gravity is also responsible for keeping planets, like Earth, in orbit around the Sun. It helps hold galaxies together and influences the movement of stars. Without gravity, everything would float away, and our universe would be a very different place!