How is it possible that the president be impeached but not removed from office?

What was the purpose of the u.s navy's convoy system

What was the main point of helen hunt jackson's book, century of dishonor? a.it showed how unfairly american settlers were treated by the us government. b.it proved that american government was not responsive to the will of the people. c.it made the point that free land was no longer available to new settlers out west. d.it outlined the poor treatment of the native americans by the government.

What is roosevelt’s corollary ? where did it specifically deal with?