Concept:A concave mirror magnifies the image of the face when it is held close, making it the best tool for fine grooming such as shaving.
Explanation:A concave mirror can form an enlarged image. When the face is placed between the pole and the focal point, the image produced is virtual, erect, and magnified. This enlarged view exposes tiny facial details, allowing a person to shave with greater accuracy.
A convex mirror, on the other hand, always forms a smaller, erect image. Although it gives a very wide field of view, it shrinks the face and is therefore unsuitable for precise tasks like shaving.
A plane mirror reflects light without changing the size of the image. It shows a true and clear reflection, but it cannot magnify the face, so fine details are harder to see.
A parabolic mirror is built to gather parallel rays and focus them at one point. It is useful for reflecting telescopes and vehicle headlights, but it does not magnify a close object and is not designed for shaving.
Answer:A. Concave mirror.