To investigate the assassination of President John F. Kennedy.
Develop Foreign policy
Explanation:
The department of state leads foreign policy through diplomacy , advocacy and assistance by advancing the interests of the people , their economic prosperity , And Saferty
Answer:
Philadelphia was one of the first planned cities in the United States.
Explanation:
Source: Goog|e
The main political unit that emerged in the world is A. the state. A state is defined as a territory or land in which a defined number of constituents is ruled over a governing body that follows and implements a system without following necessarily a superior power. I think this is powerful enough.