The correct answer is empty and to be written on through experience.
Tabula rasa when translated to English means a blank slate. When Locke referred to the mind of a human infant as a "tabula rasa", he meant that humans are born with no prior or prexisting knowledge, thoughts, language, etc. It is through experience and interaction with the world around them that infants fill the "blank slate" and learn new things like language, how to walk, how to use a fork, etc.