In a thunderstorm 5 miles away, which would you experience first?

If we are watching the sky, we see the lightning before we hear the thunder. That is because light travels much faster than sound waves. We can estimate the distance of the lightning by counting how many seconds it takes until we hear the thunder. It takes approximately 5 seconds for the sound to travel 1 mile.

Explanation:

i think its the first one

not sure if this what   you'r looking for would be percent composition