Who established a school for navigation?

the answer to fill in the blank in this question would be the word resource, it is defined as the money, material or people (since human resource is a very valuable good) that a company or a person has at disposition (meaning they can use the resource as they see fit), to be able to complete a task or achieve a goal.  

the 9th amendment

explanation:

we need the pie chart in order to

small european communities with shared traditions consolidated into large new states (apex)