Explanation:
A. water supply is greatest impact
This was important because it proved that human life had appeared sooner than believed .
One reason some people support raising the eligibility age for receiving Social Security benefits is that 2. people are living longer today. Social Security is intended to support individuals as they enter the end of their lives meaning they are no longer physically able to provide for themselves. However, with advances in medicine, today's individuals live healthier and longer lives thereby allowing them to work to an older age. Therefore, some believe Social Security should only be accessed once people are unable to work which would be later in life than it was when the bill was passed in the 1930s.
What war is it your asking about?
The correct answer is b. Portugal and Spain
Those two countries reclaimed the Iberian Peninsula from the Moslems, and then they proceeded on to find trade routes and colonies Africa and Asia, and later America too.