The sentences that help readers determine the story's setting are:
"The morning mist was completely gone. The sun was strong and bright, intensifying the color of a row of potted marigolds on the front porch of one of the houses."
These sentences provide details about the time of day (morning), the weather conditions (morning mist gone, bright sun), and a specific location (front porch of one of the houses) that contribute to the setting of the story.