Explain each of the different stages of a fire

1. Explain each of the different stages of a fire? what are some examples of protective measures that can be taken to protect assets from fire damage?

2.  Doors are the most obvious method to secure assets and there are a variety of different types of doors. Explain some of the variations and their intended purpose.

Instructions:
Provide a 1-2 pages double spaced minimum reflection for each question.