Question

by which force a body start to floot?

Answer 1

bouyant force allows the body to float.

Answer 2

Initially, bodies will likely sink to the bottom, but as bodies decompose and gasses are released in the body, the corpse will rise back to the surface as a result of buoyancy.

When a body is found floating in a body of water, it doesn’t immediately mean that they drowned. Just think about all those mobster movies when they dump bodies into rivers and shipping lanes. In fact, if a person drowns, it will probably take even longer for the body to return to the surface of the water. See, when a dead body first enters the water, it does sink to the bottom.Water will eventually fill up the lungs, expel any excess air, and bring the corpse to the bottom