You throw a ball upward and then it falls back down. how does the velocity of the ball changes as it rises and falls?

When the ball is rising up, it gains kinetic energy. when the ball reaches the very top, it will have all potential energy, until it falls back down and gains it kinetic energy. finally when you catch the ball or it falls back down, it would have gained its potential energy back.

The answer is b because for a stabile society we need sustainable supply of resources