The spies provided the information and intelligence necessary for success during the American Revolutionary War
Answer: To make traveling easier, faster and efficient
Explanation:
Colloquially these people are called brain scientists. At least for cognitive psychologists that is. That is because they study how you brain works and how you perceive things and can even change that with their results. They can prescribe medication that can help change your behavior.
Explanation: Colonial rivalry was a cause of the First World War. First of all, colonial rivalry led to strained relations among the European powers. Secondly, colonial rivalry led indirectly to the formation and strengthening of alliances and ententes. Italy turned to Germany and Austria when she lost Tunis to France in 1881.