In the context of the question, the difference in the pronunciation of 's' by two different socio-economic groups is an example of a socio-linguistic variable. Here's a detailed explanation supporting why Option 3 is the correct answer: 1. Explanation for Option 3 (Socio-linguistic variable): - Socio-linguistics is the study of how language varies and changes in social groups. It examines the relationship between language and society, including how language use…Read More