Which is an example of procedural memory?

Procedural memory is a type of long-term memory that is responsible for knowing how to perform certain tasks, often without the need for conscious thought. It involves the retention of skills and actions, such as riding a bicycle, playing an instrument, or typing on a keyboard.

In the context of the scenario, knowing how to ride a bicycle exemplifies procedural memory because it is a skill that is developed through practice and often becomes second nature; individuals can perform it automatically without needing to consciously recall the specific aspects of how to ride.

The other options represent different types of memory. Remembering the date of an important event pertains to declarative memory, which involves explicit recall of facts and events. Recalling a friend's name is also considered an aspect of declarative memory, as it involves the retrieval of specific information. Memorizing a poem relies on declarative memory as well, specifically focusing on semantic memory, which involves knowledge about facts and concepts. Thus, knowing how to ride a bicycle stands out as a clear example of procedural memory.