An example of friction being converted into heat energy is a) the sun. b) a generator. c) a snickers bar. d) rubbing your hands together.

Explanation :

Friction is a force which resists the relative motion of an object. It always act in opposite direction.

When two surfaces are in contact and moving with respect to each other, then the frictional force act in between them. Due to this force the kinetic energy converts into thermal energy.

For example, on rubbing our two hands together we feel warm. This is due to a force called friction.

So, (D) is correct answer.

you go to your settings preference and in the end youll see sth that says "i want to delete my acc" click on it and u'll acc will be deleted but u have to wait.

probably not if net force is zero