Final answer:
The triangles ΔRST and ΔWUV are similar.
Step-by-step explanation:
The correct answer is option A, ΔRST ∼ ΔWUV.
In order for two triangles to be similar, their corresponding angles must be congruent and their corresponding sides must be in proportion. By comparing the given ratios of the corresponding sides of the triangles, we find that the sides of ΔRST and ΔWUV are proportional. Therefore, the triangles ΔRST and ΔWUV are similar.