The answer would be c, judgement.
Brightness is an attribute of visual perception in which a source appears to be radiating or reflecting light.In other words, brightness is the perception elicited by the luminance of a visual target. This is a subjective attribute/property of an object being observed and one of the color appearance parameters of color appearance models.
Anxiety I would say, based on the answers you provided below.
You’re probably being too nice or laugh too much with them. Makes people assume that
When your baby grunts, it usually means they're learning how to have a bowel movement. They haven't yet figured out how to relax the pelvic floor while also using abdominal pressure to move stool and gas through their system.