Energy can be described in many ways. from the list below, what is the best definition of energy?

There are no good descriptions or definitions of energy on the list of choices you provided.  A big part of the reason for this is that you didn't provide any list of choices.

In Physics, the definition of 'Energy' is 'The ability to do work'.

where is the photo and the answer choices?

energy stored in the capacitor= 9.72 x 10⁻⁴ j

explanation:

the energy stored in the capacitor is given by

e= 1/2 c v²

e= energy stored

c= capacitance= 1.5 µc= 1.5 x 10⁻⁶f

v= potential difference=36 v

so energy stored= e= 1/2 (1.5 x 10⁻⁶) (36)²

energy stored= 9.72 x 10⁻⁴j