If a person<span> isn't breathing or doesn't have a pulse.
Hope this helps!
Let me know if i'm wrong.</span>
A hazardous material is any item or agent ( it can be biological, chemical, radioactive, and any sort of physical object ), that has the potential of harming any biological creature or the environment (by biological we mean humans, animals etc.)
Any substance that is a health hazard is a hazardous material. Here are some examples : chemicals with carcinogents, toxic agents, sensitizers etc.
Answer:
A.hold valve shut when ventricles contract
Answer is b. A wart
Reason
That’s the medical name for a wart, usually on the bottom of the foot, like a plantar wart
