Question

What is the basis for an argument in a speech or presentation?

Tone
Stance
Premise
Diction

Answer 1

Stance braces if you have a good stance then people will think you know what your talking about

Answer 2

The basis for an argument in a speech or presentation is the "Premise." The premise provides the foundational statement or proposition from which a conclusion is drawn or based upon. It sets the groundwork for the argument being presented.