The great pyramids at giza were built with massive blocks and

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.  

answer: the ocean

explanation: if you map out 30 n and 40 n latitude, you will get the ocean