Answer:
The correct answer is the word: barra.
Step-by-step explanation:
Words such as: barra, galletas, paletas, tabletas and golosinas may fit into the space. But assuming that the speaker is talking about watching a movie in the cinema (which the phrase doesn’t say explicitly), the option bar (barra) is the most suitable answer.
All other options such as galletas (cookies/biscuits), golosinas (candies), tablets (tabletas) or lollipops (paletas) do not fit so well as for the context, in the movies you might find a chocolate bar more often than the other options.