Select the most more appropriate option to fill in the blank.

It____________________volumes for his hard work.

Speaks

The most appropriate option to fill in the blank is speaks.

The idiom "speaks volumes" means to convey a lot of information without saying anything explicitly. In this context, it is the most accurate word to describe how the person's hard work is evident. The person's hard work is not explicitly stated, but it is implied by the results of their work.

The other options are not as appropriate.

• Announces means to make a public statement about something. It is not the best word to describe how the person's hard work is evident because it is too direct.
• Increase and raise mean to make something bigger or greater. They are not the best words to describe how the person's hard work is evident because they do not capture the sense of indirect communication.