Adepartment within an advertising agency staffed with different levels of managers who serve as a liaison between agency and client.

Account Management

Explanation:

According to my research on different business roles and responsibilities, I can say that based on the information provided within the question the department being defined is called Account Management. like mentioned in the question this department focuses on managing sales and relationships with individual customers or clients of the business that they work for. This is done in order to maintain or grow their company-client relationships.

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explanation:

not  

cuba  

russia  

iraq  

el salvador  

explanation:

known as the land of volcanoes, el salvador has visit seismic tremors and volcanic movement. it is the main nation in central america that does not have a coastline on the caribbean sea. about portion of all salvadorans live in the wide open. they are poor and don't have power or running water in their homes. in 1525, pedro de alvarado, a lieutenant of cortés's, vanquished el salvador. el salvador, with alternate nations of central america, pronounced its freedom from spain on sept. 15, 1821, and was a piece of a league of central american states until the point when that association broke up in 1838.