A). The apple has thermal energy, because its temperature is higher than absolute zero. It also has chemical energy, because if I eat it, I get a burst of energy and I become ambitious for a while. It also has gravitational potential energy, because if I drop it on my foot, it could bruise one of my piggies.
b). I could increase its potential energy by lifting it higher, like over my head.
c). As long as I'm just holding the apple, it doesn't have any kinetic energy. I could give it some kinetic energy by throwing it. Or I could just drop it, and let gravity give it kinetic energy.
