Do not understand this instruction of my assignment.
Responde reemplazando el OD. Respond replacing the OD. I am unfamiliar with OD. does this refer to italics? The first question ¿Tú llamas a tus amigos por teléfono mucho? and tus amigos is italicized.
1 Answer
objeto directo=od=direct object of the verb
It is the what or whom that receives the action of the verb.
In your sentence it is who is called.
Note: in some regions the leísmo is used with llamar por teléfono. I was almost surprised to see it referred to as a direct object, rather than an indirect object, but the direct object is the correct form.