Why candles can't burn unless it's lit by a match?

Answer 1

I think you may mean the candles used in the Hanukkah menorah, or hanukiyah. they are customarily lit with a special candle known as a shamash ("helper") which has its own place on the menorah situated a little higher or lower than the others.

The menorah, once lit, should be placed prominently in a window so that passers-by are reminded of the miracle in the Temple which gave rise to Hanukkah. The menorah must not be used for simple illumination. The shamash, however, can be and so it is kept with the menorah so that it can be used for light should the need arise.