1. The problem is to complete the sentence "Yo tengo pelo _______." with the correct Spanish word for "brown" hair. 2. The sentence means "I have _______ hair." and we need to fill in the blank with the correct adjective for "brown". 3. The options given are "castaño", "rojo", and "rubio". 4. "Rojo" means "red" and "rubio" means "blond". 5. "Castaño" is the correct Spanish word for "brown" hair. 6. Therefore, the completed sentence is: Yo tengo pelo castaño. This means "I have brown hair."