This is known as Archimedes' Principle. Here's why:

* Buoyant Force: This is the upward force exerted by a fluid (liquid or gas) on an object submerged in it.

* Weight of the Object: This is the downward force due to gravity acting on the object's mass.

In simpler terms: When an object floats, the upward force of the water pushing up on it (buoyant force) is exactly the same as the downward force of gravity pulling it down (weight). This creates a balance, allowing the object to float.