Answer:
We would use comparison bars if the question asks how two pieces of information compare to each other.
Explanation:
Consider the provided information.
Comparison bar is used to compare things.
It helps to identify that which quantity or number is smaller and by how much or larger by how much.
So, we can say that we would use comparison bars if the question asks how two pieces of information compare to each other.
For example: How many fewer of one thing than another.