Answer:
automatization.
Explanation:,
automatization in generally consider in child cognitive development when she is 6 year old she has to focus, consider and observe the knowledge and skill pf riding, but as she grown up and riding a bike is part of her routine , so at age of 10 she has not to consider these details. as she is not learning stage, she already learnt it. So riding bike is become a automatic process for her.