An individual's ability to remember the day he or she first swan the length of a swimming pool is most clearly an example of kind of memory.

Episodic.

Explanation:

Memory is the ability of the brain that sores any information or the data that can be retrieve and stored whenever require. Memory involves the retention information or an individual's character or any event.

Episodic memory may be defined as the memory of the autobiographic events. This memory mainly relates the emotion, location and time. The first swam of the swimming pool is considered as the episodic memory as it memorize the location.

Thus, the answer is episodic.