I would recommend, to include the scientific part of Newton's Laws of motion, with an example. Also, state how all three laws play a part in the activity. It seems like you just did the realistic part of it, swimming, now include how it happens with correct vocabulary. Good Luck!
Answer:
Potential Energy
Explanation:
Potential energy is the energy stored in an object due to it's position relative to some zero position. An object possesses gravitational potential energy if it is positioned at a height above (or below) the zero height.
Answer:
The correct option is B
Explanation:
In part A pressure is given as 
In Part B we can calculate the pressure using the formula

Where F is the force which in this case is weight which can be obtained as follow
W = Mg
Substituting 70kg for M and
for g


A is the area with a value 
So substituting into the above equation

for part c
A 

F 

Therefore 

From this we see that the value of P for part B is the greatest