¿Cuáles fueron algunos motivos clave para los europeos durante la era de la exploración?

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.  

profound political, administrative, and social changes in the british isles.

how is this a question? but yes, they were. if i recall correctly, it was very handy for native americans to use buffalo skin.