Can someone me with my physics homework? !

a water skier has a mass off 68kg.

calculate the resultant force acting on the water skier while accelerating.

Everybody is making something tough out of something easy.

Everybody knows the formula [ Force = (mass) x (acceleration) ].  Right ?

We're supposed to find the force on the skier when the skier is accelerating,
and it gives us the skier's mass.  So there you are !

Net force on the skier = (64 kg) x (the skier's acceleration).

It depends on the skier's acceleration, which we're not told.
More acceleration = the result of more net force.
More net force = the cause of more acceleration.

And that is absolutely everything that you can do with the information
that's given in this question.

It is d, all the other ones say incorrect answer .