Which two statements are true about energy transformations?
energy is never released from an object as heat.
energy is never transformed between kinetic energy and potential energy.
energy is never created.
energy is never completely transformed.
energy is never destroyed.

Explanation:

The process in which energy gets transferred from one form of energy to another is called energy transformations. This process also defines the law of conservation of energy.          

"Energy is neither be created nor be destroyed" is explained by the law of conservation of energy. It only changes one form of energy to another.

There are many forms of energy i.e. electrical energy, mechanical energy, electromagnetic energy, sound energy etc.

The example of energy transformation is best explained by a roller coaster. At the top of a big hill, there exists only kinetic energy. As it descent the hill, the kinetic energy is converted to gravitational potential energy.

Hence, the correct options are (c) Energy is never created. and (e) Energy is never destroyed.

conservation of mass

mass before something happens = mass afterwards

electric field is a function of 1/r^2

yes, the force per unit charge for a point charge is inverse square law.