What figurative language is used in this sentence..." it was like a pressure release valve"

01: 52: 08 frederick which of these statements about family relationships is true on colonel lloyd's plantation? ne; on ng any thing ther was eldom saw d in the of us from r relationship ere, and was less than the n my new ness, i had d any one of o friendships with brothers and sisters are the only cheerful part of life on this harsh plantation. o children are separated from parental figures, and sibling relationships are not encouraged. o when young children seek the comforts of home, they often travel with their siblings. o enslaved children visit their parents and grandparents on neighboring plantations when they travel.