Please explain the meaning of the image below:

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.  

a. the astrolabe could determine the correct latitudinal location of the ship

this is not a question its simply asking you to read and write a few sentences and   the question on the bottom its fairly easy, you can do this!

explanation:

ad the excerpt and i will gladly answer