One of the empowering resources that you develop by studying public speaking is which involves analyzing information to judge its accuracy and relevance.

critical thinking

Explanation:

The blank will be filled with critical thinking.

Critical thinking is the resources that you will develop by studying public speaking.                                                                    

Critical thinking is a tool that helps us to analyze information which you are hearing and have the imagination to understand the information so that one can judge its accuracy and relevance.                                    

to persuade readers which is answer c