Think about the article. Why are many middens at the edge of a group's territory?
They send a message that animals in other large groups cannot see.
They send a warning to other animals to stay away.
They send a message to other large groups that food is nearby.
They send a friendly invitation to possible mates.
The correct answer is: They send a message to other animals to stay away.
Many middens, which are refuse piles created by groups of animals, are located at the edge of a group's territory to send a warning message to other animals. By placing the middens in this location, the group is signaling to other animals that this area is occupied and defended, discouraging them from intruding or encroaching upon their territory. This helps in maintaining the resources and safety of the group.