Final answer:
Pragmatics is the study of language in the context of its use, which is a part of the linguistic discipline along with sociolinguistics. These fields explore the social aspects and variations of language within speech communities.
Step-by-step explanation:
The study of the way speakers of a language actually use the language to communicate with one another, focusing on language in the context of its use, is known as Pragmatics within the discipline of linguistics. Pragmatics explores how context influences the interpretation of meaning and how speakers of a language convey and alter meanings in different social and communicative contexts. It's a crucial area of study for understanding linguistic variation and social interaction through language. Similarly, sociolinguistics is another related subfield that examines how language use varies across different social factors such as age, gender, class, and race.
Linguistic anthropology takes a broader approach, considering language as an intertwined element of the cultural life of a people, encompassing a wide variety of social practices and beliefs. Both Pragmatics and Sociolinguistics provide insight into the dynamic nature of language and its role within speech communities, where individuals share a common grammar and vocabulary as well as social conventions surrounding language use. Key components such as lexicon and grammar form the structural basis of a language, but it is how speakers use these in communication that constitutes the core study of Pragmatics and Sociolinguistics.