Blake is teaching his six-year-old son to ride a two-wheeled…

Blake is teaching his six-year-old son to ride a two-wheeled bicycle. Initially, he has his son just sit on the bike and try to balance. Then he pushes the bike around the yard with his son sitting on it. When his son becomes more confident, Blake lets go of the bike for short distances but catches it before his son falls. Blake is using _____________ to help his son learn to ride.