What type of substances are included in chemical contamination?

Chemical contamination refers to the presence of harmful substances in food that can pose health risks to consumers. The correct choice highlights substances that are typically classified as chemicals.

Cleansing agents, for example, can leave behind residues on food surfaces if not rinsed properly. Pesticides are chemicals used in agriculture to protect crops but can be harmful if consumed in large quantities or if residue remains on produce. Dissolved metals, such as lead or mercury, can contaminate water sources and subsequently food. These substances can lead to food poisoning or long-term health effects when ingested.

In contrast, the other choices refer to physical contamination—raw meat and unwashed vegetables are not chemical substances but rather food items that require proper handling. Glass particles and wood fragments represent physical hazards that can occur during food processing, while insects and bandages also fall under physical contamination, as they are non-chemical foreign objects. Understanding the different types of contamination is crucial in food safety to ensure that food is safe for consumption.