Question #3:

Why do pilots practice a belly landing on simulators?

Answer:

Pilots practice a belly-landing on simulators to receive knowledge about this procedure and avoid mistakes in case of Belly-landing in real life. In my point of view, there is a high threat of structural damage and fire after this landing. So, pilots must be ready to perform successful evacuation in time. As usual, landing without gears is performed in case of LDG gear extension failure.