Final answer:
A wild toxic mushroom is an example of chemical contamination; this is true. These mushrooms contain toxins that can cause serious health issues or death.
Step-by-step explanation:
True. A wild toxic mushroom is indeed an example of chemical contamination. Many mushrooms produce deadly toxins that can lead to severe poisoning, even death, if ingested. Species such as the death-cap mushroom contain potent poisons that remain toxic even after cooking. Mushroom poisoning often occurs when people mistake poisonous mushrooms for edible varieties, which can look very similar. The ingestion of toxins from mushrooms is a form of foodborne illness resulting from environmental contaminants.