What distinguishes first class levers from both second and third class levers?
a.
the fulcrum is between the load and effort.
b.
there is a fulcrum on both sides of the load.
c.
greater effort is required to move the load.
d.
the first class lever is not found in the human body.

The following distinguishes first class levers from both second and third class levers: First class levers have the fulcrumm between the load and effort. Correct A This distinguishes first class levers from second and third class levers, where the load and effort are both on one side of the fulcrumm.

breathe deeply from your lower lungs - imagine a rubber ring around your waist (your diaphragm)

breathe in and try to push the ring outwards.

breathe in through your nose and out through your nose and mouth.

explanation: