Answer the following question given this paragraph: 

A mirror is typically made of glass with a shiny metal backing that reflects all the light that strikes it. When a mirror reflects light, it forms an image. An image is a copy of an object that is formed by reflection or refraction. Mirrors may have flat or curved surfaces. The shape of a mirror’s surface determines the type of image it forms. For example, some mirrors form real images, and other mirrors form virtual images. What’s the difference between real and virtual images?.


Q: What is a copy of an image formed by reflection or refraction?

 Choices:

- an example

- a photographic image

- a mirror image

- an image

A:
an image
