PLEASE HELP ME IM DESPERATE NEED

Which statement describes absolute and apparent brightness? absolute brightness and apparent brightness are identical ways to describe the brightness of a star. absolute brightness and apparent brightness change with the distance from the star to the observer. absolute brightness depends on the distance from the star to the observer, whereas apparent brightness is always the same. absolute brightness is the actual amount of light produced by the star, whereas apparent brightness changes with distance from the observer.

What is the function of the organelle labeled a in the diagram?

The flashing of directional signals as it indicates that used it safe to bed