What type of energy is produced and wasted during most energy transformations?

The correct answer to this question is Thermal. It is also referred to as heat energy. This energy occurs when a substance's molecules, along with their atoms, vibrate at a faster rate. They do so because of a rise in temperature. We experience examples of thermal energy every day. When we feel the warmth from the sun, that is thermal energy. This is because the heat from the sun makes the Earth warm.

Anything we cook something in appliances like a toaster or oven, there is thermal energy, for the heat energy warms and cooks the food. When we turn on a heater, that is an example, for the heater warms the house.