Explanation:

- We have a right-angled triangle formed by the pole, the wire, and the distance from the pole to the foot of the wire.

- The wire is the hypotenuse of the triangle.

- The angle between the wire and the ground is 60°.

- The adjacent side (distance from the pole) is 1.5 m.

- We use the cosine function: \(\cos 60° = \frac{\text{adjacent}}{\text{hypotenuse}} = \frac{1.5}{\text{length of wire}}\).

- \(\cos 60° = \frac{1}{2}\), so \(\frac{1}{2} = \frac{1.5}{\text{length of wire}}\).

- Solving for the length of the wire gives: \(\text{length of wire} = 1.5 \times 2 = 3 \, \text{m}\).

- Correct Answer: Option 2, 3 m