What does it mean to characterize a nebula as diffuse?(1 point) Responses It reflects only non-visible radiation. It reflects only non-visible radiation. Its edges do not have clear boundaries. Its edges do not have clear boundaries. Its edges have clear boundaries. Its edges have clear boundaries. It reflects only visible radiation.

The correct response is: Its edges do not have clear boundaries.

To characterize a nebula as diffuse means that its edges do not have clear boundaries.

To characterize a nebula as diffuse means that its edges do not have clear boundaries. In other words, a diffuse nebula appears spread out and does not have a distinct, well-defined shape or border.