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

Asubstitute is standing at the halfway line waiting to enter the match at the next stoppage of play the ball has gone over the touchline for throwing and referee allows for the substitution to substitute wants to take the throw-in does the substitute first have to enter the field of play before being allowed to take the throw-in