A state legislature decides that the drinking age and the voting age should be the same and therefore raises the voting age to 21. This law would be:

answer; observation learning;

a family can go through many changes which would make it complex. having children can cause a change and increase the complexity. this would change the distribution of authority and management, as the older siblings will at some point be in charge of the younger ones, and discipline must be distributed when they get in trouble.