Options:
[1]. humidity;
[2]. shivering;
[3]. improve;
[4]. energy usage;
[5]. a blazing fire;
[6]. hot air;
[7]. harm them;
[8]. Damages them;
Given those answer options, answer the question: Fact 1: Sweating reduces body heat. Fact 2: Shivering produces heat in the body. Given the two facts above, what will make human temperatures go in a different direction from what sweating would do?
A:
[2].