Answer:
R to S
Explanation:
Here, we want to get the transformation that is non-rigid
Looking at the plot, only R is facing an entirely different direction
What this mean is that by moving others across the x and y axes, we can get the transformation between them
But in the case involving R such as the transformation between R and S; merely translation is not enough
There has to be rotation and thus, in that case, it is a non-rigid transformation