The ability to cause change is defined as:

a) force and is measured in newtons(n)

b) power and is measured in watts

c) energy and is measured in joules (j)

d) impulse and is measured in newton-seconds

The question is poorly written. 
ALL of the choices cause a change in something.

A).  Force causes a change in velocity.

B). and C).  Power and energy cause changes requiring work.

D).  Impulse causes a change in momentum.
  

The answer which is not a detail carson used to describe the pool in the cave at low tide is b.  hundreds of periwinkles browse the branches and roots of the trees.