Why should you keep combustible materials away from open flames?

combustible materials are materials that catch fire

Explanation:

If you keep those near flames they can catch fire resulting a disaster

Stuff can set it on fire, here is something more in depth

Explanation:

Candles, burning incense, Bunsen burners, and other open flame devices, when used incorrectly or left unattended, can ignite combustible materials and result in personal injury, destruction of property and even loss of life.