Choose the correct indefinite pronoun from the options given below:
Indefinite pronouns are used for non-specific things- living and non-living (anybody, somebody, himself, myself, nothing, anything etc).
The sentence mentions that its 'really hot' and the subject wants something cool to drink.
'Something' is an indefinite pronoun that is used for an unknown thing. It is generally used in positive sentences.
'Anything' is an indefinite pronoun that is used for any of a kind. It is commonly used in negative sentences and questions.
'Nothing' means no single thing and 'everything' means every single thing.
In the given sentence, there are no drinks of a kind mentioned and so option B) anything is incorrect.
The sentence does not mention all drinks being present or no drink being present and so option C) and D) are also incorrect.
The subject in the sentence is looking for a 'cool' 'drink'. So, the most appropriate indefinite pronoun to use is option A) something.