Answer:
balanced , balanced , unbalanced, unbalanced, balanced, balanced, unbalanced
Explanation: you're welcome
A. <span>Standing is health-enhancing because it uses energy.
Because standing can burn a lot of calories.</span>
The one that will change the velocity of a periodic wave is :
B. Changing the medium of the wave
Waves is always determined by the properties of the medium, which means that changing the medium will change the velocity of the wave
hope this helps