1) la camiseta
This is because this is an item of clothing, whereas the other 3 words have to do with books.
Answer:
Te preguntamos Isabela y Sara visitan la playa
1. ¿ cómo es Alex? (cómo) 2. ¿ Cuándo es el cumpleaños de Mary? (cuándo)
Explanation:
I hope this helped and don't worry this is correct. I am a Spanish native speaker :)