I think I am but
lol sorry idk........................
A seesaw is an example of a first class lever The fulcrum, which is the part of the lever that does not move, is in the middle. The resistance, which is the weight (person) you are trying to lift is at one end. The effort, which is the force applied to the lever, is the person sitting on the other end.
Depressants
Stimulants
Hallucinogens
Inhalants
Opioids
Neisseria meningitidis, not sure if its gonna help but this is what i know
Without it we would become dehydrated and die.