As children grow into adulthood, their expands to include co-workers and neighbors

The correct answer is the following: As children grow into adulthood, their peer group expands to include co-workers and neighbors. A peer group is defined as a social group made of members that are around the same age, who tend to have a similar background and social status. Peer groups can also be built around shared interests and/or activities.

When a child starts to grown into adulthood, their peer group is going to expand so that it includes co-workers and neighbors, as the person starts to participate and engage in more activities, such as a working or conversing with the people that live nearby.