Which of the following could be a consequence of chemical exposure by swallowing?

Swallowing a hazardous chemical can lead to severe internal damage, which is why this choice is correct. When a toxic substance is ingested, it can cause significant harm to various internal organs and systems, potentially resulting in symptoms such as burns to the mouth and throat, gastrointestinal distress, or damage to the liver and kidneys. The body’s reaction depends on the specific properties of the chemical, with many toxic substances leading to critical health issues.

The other options, while related to possible effects of chemical exposure, do not accurately address the consequences of swallowing. Minor skin irritation pertains to skin contact rather than ingestion. Headaches and dizziness can occur due to various exposures but are more commonly associated with inhalation or dermal routes rather than swallowing. Just contamination of food's wording implies a less severe outcome and does not encompass the health risks associated with actual ingestion of hazardous materials.