Which word is correctly used in the sentence?

do you know what saying?

your
you're

The answer will be you're
Do you know what you're saying?
because you're is the same as you are but it's only used to be short

I’m just thinking something from the top of my head so it may not be much so if weathering didn’t exist, there wouldn’t be anything to break up earth’s crust naturally. so by assumptions, the rocks on earth would be larger than they actually are since there’s nothing to break them up into smaller parts.overall, i’m not really sure, but all i know is that it’ll mess up the rock cycle that we have now.hoped this .