Question

as used in this passage, what does illuminated mean?
to be observed
to glow with light from within
to have light from some source shine on an object
to change in a regular pattern
question 6

Explanation:

The word "illuminated" generally means to be lit up by a light source shining on an object. It is not about being observed, glowing from within, or changing in a regular pattern.

Answer:

To have light from some source shine on an object