Final answer:
The section that gives advice about how to respond if a person is exposed to a chemical is the Routes of Exposure to Chemicals section.
Step-by-step explanation:
The section that gives advice about how to respond if a person is exposed to a chemical is the Routes of Exposure to Chemicals section. This section explains the three main routes of exposure through which a chemical can enter the body: inhalation, ingestion, and skin or eye contact. It also provides guidance on how to handle chemicals safely to prevent exposure, such as following instructions and wearing protective equipment.