Fill the gaps in the text with the appropriate form of the word

... thing is to understand the difference between Rank and Pay Grade. Pay grade ... the level at which a service member ...
. There may be multiple ranks at the same pay grade. The Rank ... the service member’s position in their branch of service. In all cases the higher ranked individual ... in command.
The main difference between two ranks at the same pay grade are ... duties and responsibilities. ... are 9 enlisted pay grades in each of the five US military branches \(Army, Navy, Marine Corps, Coast Guard, and Air Force\)