The image shows a multiple-choice question with a diagram of a right triangle and four options. The triangle has sides labeled 3, 4, and 5, which is a classic Pythagorean triple. The question is likely asking for the value of sin θ, where θ is the angle opposite the side of length 3.

In a right triangle, the sine of an angle is the ratio of the length of the side opposite the angle to the length of the hypotenuse. Therefore, for the angle opposite side 3, with hypotenuse 5, the calculation is:

$\sin \theta =\frac{\text{opposite}}{\text{hypotenuse}}=\frac{3}{5}$

Final Answer: $\frac{3}{5}$