During a meeting, Ricardo does not tell the others what part he played in bringing the project to completion; instead he talks about his part in a modest way, and when praised, he uses self-deprecation. Ricardo uses what kind of verbal mode?

Self-humbling.

Explanation:

Self-humbling can be defined as an act of humbling oneself or serving others. In the verbal form of communication, self-humbling denotes modest talks, restraint, self-deprecation of one's performance.

In the given case, Ricardo is using the self-humbling form of verbal communication. It can be inferred as he is using modest talks, and self-deprecation when praised for his performance.

So, the correct answer is self-humbling.