Answer:
The answer is A it only has 1 line of symmetry.
Explanation:
A line of symmetry is a line that cuts a shape exactly in half.
This means that if you were to fold the shape along the line, both halves would match exactly. Equally, if you were to place a mirror along the line, the shape would remain unchanged.
However, for this shape you can only fold the shape once (vertically) to have an exact match; making the answer the first option.