Why does black powder not explode unless it is ignited in a confined area?

In an unconfined area it just burns and safety fuses.

Although this may be the opposite of what you think i will say it anyway. you were brought into this world for a reason and you still have soo much ahead of you. not everybody has an opportunity of living a great life, but it doesn’t give you a reason to end everything. somebody in the world loves you, and imagine what you would do to them if you left forever.

A,b,c is the answer to the question