Which process involves vector addition?

The process that involves vector addition is accurately described by the option that refers to adding or combining quantities that have both magnitude and direction. In physics, vectors are quantities that have both these properties, such as displacement, velocity, and force. When performing vector addition, the individual vectors are combined to result in a resultant vector, taking into account both their magnitudes and directions.

This addition requires specific techniques such as the parallelogram law or using trigonometry when the vectors are not aligned in the same direction. Each vector contributes to the overall direction and magnitude of the resultant, showcasing the principles of how vectors interact with one another in a spatial context.

In contrast, subtracting quantities with direction typically involves a different approach, as it often requires changing the direction of one of the vectors before application of addition to find the resultant. Combining quantities that only have magnitude does not entail considering direction and is effectively dealing with scalar quantities. Decomposing vectors into their perpendicular components is a method used within vector addition processes, but it does not itself involve the act of combining vectors. Thus, the process of vector addition is foundational to understanding how vectors operate in physics, reaffirming that the option stating the combination of quantities with both magnitude and direction is the correct choice