The talk test is a simple way to measure relative intensity. In general, if you're doing moderate-intensity activity you can talk, but not sing, during the activity. If you're doing vigorous-intensity activity, you will not be able to say more than a few words without pausing for a breath.
Physical because for it to melt it needs to be in a warm enviroment.
External or internal and an example is how you feel about yourself I think
Answer: American Hospital Association
Explanation: because Draco malfoy said so
