Question

what is a rotation?
a turn
a slide
a flip
a multiplication by a scale factor

Explanation:

A rotation is a transformation in geometry where a figure is turned around a fixed point (the center of rotation) by a certain angle. In the context of the given options, a rotation is equivalent to "a Turn". A slide refers to translation, a flip refers to reflection, and a multiplication by a scale factor refers to dilation.

Answer:

a Turn