Which of the following is an example of toxic metal poisoning?

Immediate illness from consuming food stored in copper containers is an example of toxic metal poisoning because copper can leach into food, particularly acidic foods, leading to toxicity when ingested in significant amounts. This type of poisoning can cause symptoms such as abdominal pain, nausea, vomiting, and diarrhea. Copper is essential in small amounts for human health, but excessive intake can be harmful.

The other scenarios presented involve different types of food safety concerns. Illness from eating undercooked meat pertains to bacterial or parasitic infections rather than metal poisoning. Food allergy reactions from shellfish are immune responses to specific proteins in shellfish and are unrelated to metal toxicity. Hives from certain vegetables relate to allergic reactions as well, highlighting the diversity of food-related health issues outside the realm of toxic metal exposure.