OPT:
(1). igniting fuel and oxidiser
(2). The bending of a ray of light
(3). makes digestion easier
(4). It gets heated up
(5). Movement of an air mass
(6). move to different locations
(7). enormous damage to homes
(8). to move people
Q: You are presented with the quiz "What does heat energy do?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "cooking food requires adding heat energy" and "cooked foods are easier to digest". So, what's the best answer to the question?
A:
(3).