An image formed by the convex mirror is always ______.

virtual and erect

The correct answer is option 3. virtual and erect.

An image formed by a convex mirror is always virtual and erect.

Convex mirrors, also known as diverging mirrors, always form virtual and erect images. These images appear behind the mirror and are upright relative to the object. The virtual image is formed by the apparent intersection of the diverging rays of light reflected from the mirror. This is a characteristic property of convex mirrors, regardless of the position of the object.