hermano, if you are 15 years old, then that's the only one that makes sense.
Answer: Tengo 15 años. Mi hermano tiene 17 años. Es alto y creativo.
Translation: I'm 15 years old. My brother is 17 years old. He is tall and creative.
Explanation: With a difference of two years they can only be brothers. It is impossible that they are father or mother and son.
[tex]\textit{\textbf{Spymore}}[/tex]