When you step out of the bright sunshine into a dark movie theater your vision gradually adjusts to the relative gloom. This process is known as adaptation. A. intensity B. retinal C. vestibular D. se?

The process of your vision adjusting from bright sunlight to the dark environment of a movie theater is known as adaptation, specifically related to the intensity of light. Therefore, the correct answer is A. intensity. This adaptation occurs as your eyes adjust to lower light levels, allowing you to see more clearly in the dark.