Answer:
Frogs in low- altitude habitat
Step-by-step explanation:
In one experiment, a control group is one that is treated the same as other groups in the experiment, but the control group does not receive the treatment being evaluated in the research. Thus it is possible for the control group to serve as a measure of how much the treatment assessed in the research interfered with the groups being tested. Thus, in the above experiment, we can state that in an experiment that seeks to investigate the impact of UV radiation present in high altitude habitats on the yellow-legged mountain toad population, the control group would be frogs in low-altitude habitat.