Original sentence: Residents of the houses are expected to perform work (typically five hours per week) as part of their rental agreement, which makes the rent lower.The BSC houses and/or feeds over 1,300 students in 17 houses and three apartment buildings.The BSC is led by a board of directors which is composed primarily of and elected by the student members
Edited sentence: Residents of the houses are expected to perform work (typically 5 hours per week) as part of their rental agreement, which keeps rent low.The BSC houses and/or feeds over 1,300 students in 17 houses and 3 apartment buildings.The BSC is led by a board of directors which is primarily comprised of and elected by the student membership