Teaching grammatical aspect of language through form based approach is to acquire:

Correct option is B

Declarative knowledge
Teaching the grammatical aspect of language through a form-based approach is aimed at acquiring declarative knowledge. Declarative knowledge refers to knowledge about something, such as facts or things that can be explicitly stated or described. In the context of grammar, it means understanding the rules and structures of the language, such as verb tenses, sentence construction, and the functions of different parts of speech.