Which of the following letters has two lines of symmetry ?

The correct option is H.

A line of symmetry is an imaginary line that divides a shape or letter into two identical, matching halves that reflectionally mirror each other.

Let's analyze the lines of symmetry for each given letter:

1. Letter E: Has 1 line of symmetry (a horizontal line passing through the middle).

2. Letter U: Has 1 line of symmetry (a vertical line passing through the center).

3. Letter H: Has 2 lines of symmetry:

- A vertical line of symmetry down the middle, which splits the left side and right side into identical halves.

- A horizontal line of symmetry across the middle crossbar, which splits the top half and bottom half into identical halves.

4. Letter B: Has 1 line of symmetry (a horizontal line through the middle, assuming symmetric loops).

Therefore, the letter that has two lines of symmetry is H.