Which of the following ensures proper food safety during transportation?

Using thermal insulation during transportation is vital for ensuring food safety because it helps maintain the appropriate temperature for food items, thereby preventing the growth of harmful bacteria. Proper temperature control is crucial in food safety, as certain foods need to be kept hot or cold to minimize the risk of foodborne illnesses. Thermal insulation safeguards both hot foods from cooling down and cold foods from warming up, thus preserving their safety and quality during transit.

Undercooking, low ventilation, and keeping foods at room temperature do not contribute positively to food safety. Undercooking can allow pathogens to survive, while low ventilation might not provide adequate airflow, potentially leading to conditions conducive to spoilage. Keeping foods at room temperature can promote bacterial growth and increase the risk of foodborne illness. Therefore, maintaining proper temperatures through thermal insulation is the most effective method for ensuring food safety during transportation.