Use this fact to answer the question: an amphibian is cold-blooded

John's pet frog was sick because it wasn't staying warm enough. Maybe

Available options:
1). The frog was getting burned by a heat lamp
2). the frog was unable to regulate its body temperature without an external heat source
3). The frog was using too much ice in its drinks
4). The water in the tank had dried up.

The answer is:
2).