Which of the following is NOT a method by which chemicals can enter the body?

The correct answer is based on the understanding of how chemicals typically enter the body. Inhalation, ingestion, and absorption are three well-known pathways through which harmful substances can enter and affect the body.

Inhalation occurs when airborne chemicals are breathed in, allowing them to enter the respiratory system and potentially into the bloodstream. Ingestion involves consuming chemicals through food or drink, which can then affect the digestive system and enter circulation. Absorption takes place when chemicals directly penetrate the skin or mucous membranes, allowing them to enter the body tissues and bloodstream.

The final choice mentions "contact with skin without absorption." This indicates a scenario where a chemical comes in contact with the skin but does not penetrate it. In this case, the chemical would not enter the body at all, making it not a method of entry. This highlights the importance of protective measures and understanding how exposure can occur in various situations, emphasizing that while chemicals can have adverse effects upon contact, they need to be absorbed to enter the body and potentially cause harm.