Final answer:
Certain chemicals or chemical reactions in a lab can produce dangerous fumes, so using a fume hood is important.
Step-by-step explanation:
True. Certain chemicals or chemical reactions in a lab can produce dangerous fumes. It is important to use a fume hood to prevent inhalation of these fumes. Chemicals that emit fumes can be harmful if inhaled, so it is crucial to follow your teacher's instructions for safety.