The correct answer is option b) "frictional". Frictional unemployment occurs when someone quit his job before finding a new one. In this case Joe is experiencing tireness and he needs to take a break of his current work. This type of unemployment is natural and could be considered beneficial since people look for other jobs where they could be more productive.
Answer:
An obelisk
Explanation:
An obelisk is an object that that stands on either side of a gate at the entrance of many Egyptian temples