Select from: (1). vaporization. (2). exercise. (3). Animal fur. (4). magnetism. (5). Solar energy. (6). dry and hot. (7). sun. (8). evaporation.

Fact 1: When the body is hot , sweat is produced to cool the body. Fact 2: Humans use evaporation of water, sweat, to cool their bodies. Given the two facts above, what is used to cool the body?
Answer:
(8).