Select the most appropriate meaning of the underlined idiom in the given sentence.

Newton’s work in the field of physics speaks volumes about his genius.

conveys a great deal

The most appropriate meaning of the underlined idiom "speaks volumes" in the given sentence is conveys a great deal.

The idiom "speaks volumes" is used to describe something that communicates a lot of information, even though it is not explicitly stated. In the given sentence, the speaker is saying that Newton's work in physics is so impressive that it speaks volumes about his genius.

The other options are not as appropriate meanings for the idiom "speaks volumes":

• Advertises his work: This idiom means to promote something or make it known to the public.
• Claims fame and honour: This idiom means to say that you are famous or important.
• Does not give a detailed report: This idiom means to provide a summary of something, rather than a detailed account.