What did hernando de do to try to find when he explored north america

What would lead a historian to consider two events to have a relationship of correlation rather than causation?

This is the belief that a nation must develop and maintain a strong military force in order to pursue and defend its national interests.

The battle of sabine pass is important because? a) it was a stalemate between union and confederate armies. b) it resulted in the largest confederate casualty in the war. c) it marks the failed attempt of the union army to invade the confederate state of texas. d) it was won by the union soldiers and marked a turning point in the western front of the war.