Answer:
Natural language understanding (NLU) is a branch of natural language processing, which involves transforming human language into a machine-readable format.
Explanation:
NLU is branch of natural language processing (NLP), which helps computers understand and interpret human language by breaking down the elemental pieces of speech. While speech recognition captures spoken language in real-time, transcribes it, and returns text, NLU goes beyond recognition to determine a user's intent.
Answer:To entertain
Explanation:it is not informative or persuasive
A legend is a caption, a title or brief explanation appended to an article, illustration, cartoon, or poster.
A key is an explanatory list of symbols used in a map, table, etc.
