In which part of a house would you most likely have a barbeque?

a. el dormitorio
b. la terraza
c. el ático
d. el sótano

option B, La terraza.

Explanation: Let's analyze the options:

A "el dormitorio" means "the bedroom", this is not a nice place to do a barbeque, so we can discard this option.

B "La terraza" this means "the terrace", this is a good place, because the smoke can flow.

C "el atico" this means "the penthouse", this also is a bad place because you will fill the penthouse with smoke.

D "el sotano", means "the basement", this has the same problem as before.

So the only option tath makes sense, is the option B, La terraza.

when you are going to explain a procedure,   the first thing to do is to name the parts or the apparatus you are going to describe in terms of how it or they function. also it is important to know who is going to operate it and the abilities this man/woman requires to manage it.