Which word best completes the sentence? para enviar una tarjeta postal, hay que ponerla en

Translated from Spanish into English:

"To send a postcard, you have to put it in the mailbox".

Or,

 "Para enviar una tarjeta postal, hay que ponerla en buzón."

Explanation:

The mail box:

Before the emergence of technology most of the individuals when required to communicate through long distances, they often used the sources of letters or mails. As they were considered more convenient and safe, while the mailman was there for the delivery of the letters, as well as other items from one place to another as per requirement.

Now, a days there is technology to serve people around the globe, but still in some regions the mailman or the courier to operate as the source of message or items delivery between any two or more then two individuals.