<span>Me duele la cabeza.
This means I have a headache.
The reason for this is because it is an I statement and the other that isn't a question is a you statement which isn't explaining how you feel.
Hope this helps!</span>
Tu because If you put Mi or mis son rojos it says my are red which dosen't really make sense. Since you put tu in front of son (plual) it would be they are red.
There is a frog. The frog has a small mouth. The frog has a problem. The poor frog can't eat with a small mouth. So the frog's friend has a solution. The frog's friend makes tiny sandwiches for the frog.