Elijah's backyard swing set is at the bottom of a sloping bank. when elijah was first learning to walk, just after his firts birthday, he tries to walk feet-first down the bank and promtly took a fall. now, at age 18 months, he sits, and carefully scoots down the bank. what does elijah's behavior demonstrate?

Realizes that a sloping surface gives a  greater possibility of falling

Elijah's behavior is an expected behavior exhibited by a child that undergoes both physical and mental development. His frequent falls from a sloping surface gives him an idea that a sloping surface will most likely caused him to fall again and from there he gets to devise a technique not to fall again.