Final answer:
The word that corresponds to "older" in the sentence "El hermano de Sandra es (older) que Sandra" is "mayor."
Step-by-step explanation:
To fill in the blank in the sentence "El hermano de Sandra es (older) que Sandra," we need to choose the word that corresponds to the word in parentheses. The word that corresponds to "older" is mayor (option A). So, the sentence would be: "El hermano de Sandra es mayor que Sandra." The word "mayor" means "older" in Spanish.
Learn more about Comparative adjectives in Spanish