Today, many take it for granted that there is a president in the U. S., along with two houses of Congress. When the Constitution
was being written, none of this was certain. Take a moment to
imagine: how could the U. S. Constitution have been different?

answer; (d) one tectonic plate plunges beneath another; (most common,convergent boundaries)

the answer is : the nut cases won't quit battling and their recurrence of flights will going to continue as before despite the fact that the battles are less hazardous now because of their bills have all of a sudden been blunted.   in the falcon dove diversion, two creatures will drive towards one another to crush one another, among the two one will win and other will swerve. in this way, clearly, the battle will be dependably there between two creatures for the assets or mate.

answer; continuous;