Why did king phillip ii of macedonia take an interest in conquering greece

Gradpoint answer is "As a child he lived in Thebes and came to embrace the ways of the Thebans."

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.