Which of the following statements about energy conservation is true?

The statement that energy can only be transformed is rooted in the law of conservation of energy, a fundamental principle in physics. This law states that energy cannot be created or destroyed; it can only change from one form to another. For example, when you turn on a light bulb, electrical energy is transformed into light energy and thermal energy. Throughout various processes, such as in mechanical systems or chemical reactions, energy may transition between kinetic, potential, thermal, and other forms, but the total amount of energy remains constant.

The other statements contradict established principles in physics. Energy creation and destruction are not feasible according to the conservation laws. Additionally, in a closed system, where no energy enters or leaves, the total energy remains constant, affirming that energy is indeed conserved. Kinetic energy, while it can change forms within an isolated system (such as during collisions), is not always conserved in real-world scenarios, particularly when external forces are present or during inelastic collisions. Thus, the statement regarding the transformation of energy accurately reflects the principles of energy conservation in physics.