The ability of the ears to do their job has most likely decreased in which person? a middle-aged person a school-aged child a young adult an elderly person

The sense of hearing usually decreases with age.

During the paleolithic, hominins grouped together in small societies such as bands, and subsisted by gathering  plants  and fishing, hunting or scavenging wild  animals. the paleolithic is characterized by the use of knapped stone tools, although at the time humans also used  wood  and bone tools.