What indicates adulterated food unfit for human consumption?

Adulterated food refers to food products that have been compromised in quality, purity, or safety, often through the addition of harmful substances. This can include contaminants like pesticides, toxins, or chemical additives that pose a risk to human health. When food contains harmful substances, it becomes unfit for consumption, posing serious health risks to individuals. This concern is critical in food safety regulations, as the presence of such contaminants must be identified and eliminated to protect consumers.

The other options do not imply that food is unfit for consumption. For example, food containing flavors or that is freshly prepared can still be safe and acceptable for eating, as these aspects do not inherently indicate any risk. Similarly, food that is brightly packaged may be appealing but does not offer any indication of food safety or its suitability for consumption. Thus, the presence of harmful substances in food categorically defines it as adulterated and unsuitable for human consumption.