<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>
<h3>Esta piña es mi piña. correct incorrect</h3>
Answer: correct
Esta piña es mi piña.
This pineapple is my pineapple.
Explanation: "Esta" is a demonstrative adjective and "mi" is a possessive adjective.
A Álvaro Le duelen las piernas. le