eli5 How does gravity work? Where does it come from?

Question

eli5 How does gravity work? Where does it come from?

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Answer 1

Basic model of gravity was explained to me when I was a kid with a towel and basically any item.

Stretch out a towel and hold it by its corners until it’s almost even. Then drop something heavy-ish onto the towel.

The towel is no longer even and there’s a ring around the item that “drags down” the towel. That is a representation of gravity. Put another item next to the first item on the towel. If the items are close enough, the heavier item might pull the lighter item into its indent. Thats a basic model of how gravity interacts between two objects.