Answer:
Strength of the electric field
Step-by-step explanation:
The amount of charge and the distance from the charge determine the strength of the electric field.
Mathematically, it can be written as :
![E=(1)/(4\pi \epsilon_0)(q)/(r^2)](https://img.qammunity.org/2020/formulas/physics/high-school/usqng2q8f1zbulnq0sxn4vktbjdcxj4rjz.png)
where,
q is the electric charge
r is the distance between the charges
It can be also defined as the electric force per unit electric charge. Hence, the correct option is (c) " Strength of the electric field ".