Final answer:
The cerebellum is the part of the brain that is used to remember how to ride a bicycle, as it is involved in processing implicit procedural memories which include motor skills like cycling.
Step-by-step explanation:
The part of the brain used to remember how to ride a bicycle is the cerebellum.
The cerebellum plays a crucial role in processing procedural memories, which include skills such as riding a bicycle. These types of memories are part of what is known as implicit procedural memory, storing the knowledge of how to perform certain actions almost automatically. This form of memory is distinct from explicit memory, which involves conscious recall of information and is associated with the hippocampus. Unlike explicit memories, procedural memories can often be carried out without conscious thought, indicating the involvement of different neural pathways and brain regions.
The cerebellum enables this type of memory by helping to fine-tune motor activity and coordination, allowing for the smooth execution of practiced movements. When you first learn to ride a bicycle, you require conscious effort to maintain balance and control the bike, but over time, these actions become more automatic as they are encoded into procedural memory by the cerebellum, thus becoming an ingrained skill.