The most important thing inexperienced speakers can do to increase their confidence is
a. breathe
b. exercise
c. practice
d. worry

c. practice

Explanation:

Public speaking is a skill, and like most skills, it can be developed through practice. Most people are not born being good public speakers. Instead, those who are often become so through repeated experiences with it. This is particularly important for people who get nervous or anxious before speaking. Practicing will not only improve your skills, but it will also allow you to gain confidence.

the rocket launch by showing how the population around it changes its behavior as the earth's influence over the martian planet when he uses the term "green star".

explanation: