From Day 2: El piso (The flat)
¿Y esa foto?
Esa points to a feminine thing a little farther away: esa foto, “that photo”.
Hear it in the conversation
Marta
¡Qué bonita! ¿Y esa foto?
It’s so pretty! And that photo?
It is not es: es is the verb in Es mi abuela Fina (“It is my grandmother Fina”). La foto is feminine despite ending in -o.