A match will work, but you are likely to wind up demonstrating the Hindenburg explosion.
Perhaps you should do a little research for this question. It might be intended for you to learn something besiedes the obvious.
The reaction of hydrogen with oxygen to form water requires a little ______________ to get it started?
Do your own homework.
You will learn nothing if the Blurtit Community researchs your answer. It's not fair to you, your teacher or your parents if anyone here researches your answer. You have learned nothing.
Do your own homework.