Final answer:
The term "combustible" means flammable, indicating the property of a material that allows it to ignite and burn easily.
Step-by-step explanation:
The meaning of "combustible" is c) flammable. Something that is combustible can easily catch fire and burn. This term is often used in chemistry and physics to describe materials that can ignite and support combustion. For example, napalm is known as an incredibly combustible substance because it is formed by turning gasoline into a jelly-like form that can catch fire readily.
Likewise, a lack of water and fire extinguishers in the room can exacerbate a fire, meaning that materials that are combustible may pose a higher risk in such situations. Combustion is a rapid chemical reaction that involves the combination of oxygen with a fuel source, resulting in the release of energy in the form of light and heat.