Final answer:
The phrase "certain summer morning" belongs to the physical aspect of setting.
Step-by-step explanation:
The phrase "certain summer morning" belongs to the physical aspect of setting. The physical aspect of setting refers to the tangible and observable elements of the story, such as the time of day, weather, and setting details. In this case, the phrase describes a specific time of day during the summer season, which falls under the physical aspect of setting.
Learn more about Setting in literature