What promise did the dwarves make to Bilbo?

This device blocks an opening along the base/floor of stairs or other walking or working surfaces where materials or body parts might otherwise inadvertently fall through. it should be 4 inches high, with not more than ¼ inch clearance above the floor

Answer all plzz it’s due tomorrow i need it

Which of the following is not a part of plot? exposition falling action rising action conflict i believe its conflict