Verified answer

First question: they demonstrate intelligence because they exhibit an ability to not just think but the ability to organize thoughts as well as the ability to sort thoughts into degrees of pertinence to a given topic. Also the ability to compose.

Second question: these abilities show a person's command over both thoughts and emotions, resulting in composure, and it's the composure that additionally commands respect.

Third question: These skills exercise the mind and encourages logical thought basically by exercising one's ability to organize thoughts and compose them into an effective means of conveying these thoughts to others.