What is the correct natural physical development sequence?
Lift head, Roll over, Sit up, Creep, Crawl, Cruise, Walk
Lift head, Roll over, Creep, Sit up, Crawl, Walk, Cruise
Creep, Lift head, Roll over, Crawl, Sit up, Cruise, Walk
Sit up, Lift head, Roll over, Crawl, Creep, Walk, Cruise