Which of the following is a true

Energy cannot be changed from one form to another.

Energy can change from one form to another.

Energy can only change into heat energy.

Energy can be produced by living things.

Energy can change from one to another

Explanation: Think about riding a bike, you use energy right? When riding a bike at constant speed, only kinetic energy of the air disturbed by the bicycle/cyclist's motion is generated. This kinetic energy is then dissipated in fairly short order. So when you ride your bike you hope that the muscular (chemical) energy is converted mainly into mechanical energy.

Credits to google.

come closer and become far apart and become steam/gas