Definition of mutism. : the condition of being unable to speak whether from physical, functional, or psychological cause.
Adolescents rushing to become adult have pushed the government reconsider the age of responsibility. Therefore, 21 is the age of responsibility taking account: decision making, impulse control and maturity. To begin with, the age of responsibility is defined by a persons decision making. Poor decisions at times lead teenagers to more dangerous/complicated situations.
Chores for young children let them practice responsibility. The chores are more for their benefit than yours. Around age 6, children start to develop fine motor skills. Children in the 6 to 12 year age group should be able to clean the kitchen and bathroom.