What’s the nouns replacing

Based on the audio, why do you think the friends get together to have  chocolate con churros? the friends get together to have  churros con chocolate  to   try this snack  socialize  see the puerta del sol  see the bear statue

Me quedan tres dólares. are left over are bothering are lacking are important

Es aconsejable que ustedes sobre el país donde van a residir. a. aprenda b. aprendamos c. aprendan d. aprendas