The correct option is the first one "ATP is an energy molecule that helps with active transport." ATP refers to "Adenosine Tri-Phosphate" which is a pretty useful molecule in every physiolocal issue of every cell. Therefore, it is very important with active transport. When ATP losses one of its phosphates (remember it has three) -it becomes ADP- it releases a high amount of energy which is useful for several processes, among them, active transport.