Final answer:
Our voices communicate thoughts, emotions, and credibility.
Step-by-step explanation:
When we communicate through our voices, we are able to express thoughts, emotions, and convey credibility. Our voice is a powerful tool that allows us to share our ideas, feelings, and opinions. For example, when we speak with enthusiasm, our voice can convey excitement or happiness. Similarly, when we speak calmly and confidently, our voice can convey credibility and trustworthiness. Therefore, the answer to your question is d. all of the above.