Final answer:
Hazardous materials can be accidentally ingested through various activities, such as swallowing contaminated substances or ingesting contaminated food or water.
Step-by-step explanation:
Hazardous materials can be accidentally ingested through various activities. For example, chemicals can spill or settle onto food, beverages, cigarettes, beards, or hands, which can then be unknowingly ingested through swallowing. Ingestion of contaminated food or water, exposure to contaminated water while swimming or bathing, and ingestion of contaminated rice or meat are other ways hazardous materials can be accidentally ingested.