Fact 1: Bacteria cause food to spoil.

Fact 2: Food spoils quickly at high temperature.

Given the two facts above, answer the question "bacteria are more active at what" with the following options: 
- their hosts
 - high temperatures
 - dormant state
 - dry and hot
 - they body they live in
 - energy barrier
 - aerobic capacity
 - Animal survival


 

  high temperatures       