An oven uses thermal energy to cook food. Thermal energy is the energy that comes from the movement of particles in matter. The particles in hot matter move faster than the particles in cold matter. When the particles in food collide with the particles in the hot oven, the food gets cooked.
Other related questions:
Q: What energy does an oven use?
A: Most ovens use electric energy, though some may use natural gas or propane.
Q: Does an oven use electrical energy?
A: Yes, an oven uses electrical energy to heat up food.
Q: What type of energy is a gas oven?
A: A gas oven runs on natural gas or propane.