The correct answer is: translation, then reflection.
In geometry, translation is described as the movement of an object or figure horizontally or vertically. While flipping an object or figure across a vertical or a horizontal line is called reflection.
From the attached picture, we can see that the figure can be shifted vertically from point P to R by some units.
And then if we reflect the figure NMP across the line which joins P & R we get the triangle STR.
Therefore, we need to first translate the triangle MNP and then reflect it to map onto TSR.
the answer here is C) translation, then reflection
if you translate point P to point R and then translate across that point they map onto each other