The reduced motivation and effort shown by individuals working in group is called social loafing. Social loafing is when person who is part of some group not invest enough effort and she is not motivated to achieve a common goal. This type of people are more productive when they work alone.
Based from a huge study that was done with 5,500 respondents who lived in Europe from childhood through late adulthood found that eveningness peaked at ages a. 20 to 21 years.
The study’s results mean that a lot of people are in the stage of peak alertness during the age of 20 to 21 years old. This age is the stage of a person’s life where they are in the young adulthood stage.
Bantu civilization developed city-states along the East coast, which were soon involved in the bustling Indian Ocean trade. These city-states developed independently and remained that way, trading East African resources, pottery, and slaves. In the process, most of these cities also adopted Islam as their religion.
This was copied from google.
The answer to this would be first come first serve