It is a molecule because hydrogen is an element.
An element is made up of molecules
The population would decrease, the more predators there are the more food needed for the species .
Based on the information I would assume B, 73 degrees...
It shouldn't be A, 4 minutes on the burner should increase the temperature.
If it were D, it would be beyond boiling, and water takes a decent amount of energy to heat, D should be all vapor.
Same logic for C, it's basically almost boiling.
I would say 73 degrees seems most reasonable for 4 minutes.
Sorry I’m only answering so I could upload
