Concept:In linguistics, the smallest unit that carries meaning is called a morpheme. It cannot be split further without losing meaning.Explanation:Morphemes are the building blocks of words. Some morphemes can stand alone, like “happy” or “dog” – these are free morphemes. Others, like “un-” or “-ing”, must attach to a base and are called bound morphemes. Free morphemes are either lexical (nouns, verbs, adjectives) or grammatical (prepositions, conjunctions). Bound morphemes include affixes like prefixes and suffixes. Syntax deals with word order in sentences. Phonemes are the smallest sound units, not meaning units. Pragmatics studies language in context. Therefore, the smallest unit of meaning is the morpheme.Answer:B. morpheme