The news that he has died is false. Here the underlined part is-

Explanation: The underlined part 'that he has died' is a dependent clause that modifies the noun 'news' and provides additional information about it. Hence, it is an adjective clause. Incorrect options: A. Adverb clause – it does not express a relationship of time, cause, or condition. C. Noun clause – it does not function as a noun. D. Principal clause – it is not an independent clause. Note: An adjective clause typically begins with relative pronouns like 'that,' 'which,' or 'who,' and functions to describe or qualify a noun.