Concept:Language register refers to the way language changes based on the situation or context in which it is used.
Explanation:Language is not fixed; it varies with different situations, purposes, and relationships between speakers.
For example, the language used with family is informal, with colleagues is more formal, and with a boss is most formal.
This variation according to context is called a language register.
It is not about social differences, grammatical correctness, or official use only.
Answer:Option B – The variation in language according to the context in which it is used.