Question

When we come down the stairs we lose. Energy​

Answer 1

Because your height decreased, your potential energy also decreases (whether it equals 0 or not depends on where you define 0 Ug to be.)

All of the energy you "lost" has been converted into internal energy, sound energy and heat.

Answer 2

Answer:

All of the energy you "lost" has been converted into internal energy, sound energy and heat.