1. Merry and Pippin were the inadvertent cause of Boromir's death. From whom or what did the heir of Minas Tirith try to defend the young Hobbits that cost him his life?
From Quiz Merry's and Pippin's Parts in the War of the Ring
Answer:
Orcs
As the Company of the Ring scattered Merry and Pippin ran, literally, into a mixed mob of orcs from Minas Morgul and Isengard, with orders to kill all but the Halflings. Merry wounded a few before the young Hobbits were disarmed and, when he arrived, Boromir killed several, but not enough to make a difference. One man, however strong his sword arm, couldn't stand against an orc host, especially one armed with bows.
But his death was not in vain. Earlier in the day, Boromir had tried to wrest the Ring from Frodo by force. By the time the fit of madness passed and he realized the folly and wickedness of what he had done, it was too late. Frodo was gone. Trying, even unsuccessfully, to protect the young Hobbits redeemed him. Aragorn certainly thought so. He died with Aragorn's reassurance and praise in his ears.