All of the following examples of unemployment are correctly paired with their causes except

frictional: retired people and volunteer workers
structural: new technologies make certain skills unneeded
cyclical: businesses produce more than they can sell and lay off workers
seasonal: professional athletes during their off-season

Frictional: retired people and volunteer workers.

Explanation:

Frictional unemployment is a constant in any economy. It´s caused by temporary employment transitions, as workers and employers may lack some information. For example, someone looking for their very first job may not have enough resources to find a suitable job and ends up not taking other employment, temporarily holding out. On the other hand, a business may refrain from hiring new employees if they think there´s no one enough qualified available when there actually is.

why do you think kush in nubia is not as well-known as egypt?