4. __(a)__ activities are those that do not require oxygen to generate the energy for muscular activity…..the __(b)__ is so high that oxygen cannot be delivered and utilized to produce energy, and can be carried out for only short periods of __(c)__ (how much time?)

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