Select from the following.
(1). warmth
(2). stored
(3). motion
(4). light
(5). oil
(6). heat
(7). sugar
(8). mostly
Given those answer options, answer the question: Fact 1: Some light bulbs convert electricity into light and heat energy. Fact 2: Since the purpose of a light bulb is to generate light, the heat is wasted energy. Given the two facts above, what type of energy generated by the bulbs is wasted?
A:
(6).