Best Answer Explained in Below-:

Vernacular refers to the everyday language spoken by ordinary people in a specific region or community, distinct from the formal, literary, or official languages. The term is derived from the Latin word "vernaculus," meaning "domestic" or "native." It encompasses local dialects, colloquialisms, and idiomatic expressions that characterize a particular geographical area or culture.

The option B, "the language spoken in a particular area," correctly captures this essence. It emphasizes how vernacular language is shaped by local customs, beliefs, and historical influences, making it distinct to that region. For instance, vernacular in the United States can include various regional dialects, such as Southern, Midwestern, or New England English, each with unique linguistic features.

In contrast, options A, C, and D misrepresent the concept. A dialogue refers to a conversation between people and is not synonymous with vernacular. An official language is a statutory language used for government and official purposes, often divorced from local speech patterns. A journal is a written collection of articles or studies, which does not pertain to spoken language. Therefore, option B is the most accurate and comprehensive definition of vernacular.