When vectors are added or subtracted, the net force is called the
sum
solution
resultant
vector quantity

Option (3)

Explanation:

The resultant vector is usually defined as a single vector that is obtained from the addition or the subtraction of two distinct vectors. It is widely used in the field of Mathematics and Physics, where this resultant vector denotes the magnitude as well as direction of any physical property such as velocity, force, and are represented graphically.

These resultant vectors along with the other vectors are drawn by using an arrow.

Thus, the correct answer is option (3).