Answer:
The picture on the right…

Represents a summary of the WBS, not the WBS itself
Doesn’t break down the project into small enough pieces. May include large and small tasks that are greater than the 8 to 80-hour rule of thumb
It may not include all the work, In contrast, the construction of the WBS chart on the left helps to ensure that nothing slips through the cracks
Does not allow the team to walk through the project
It is usually not created by the team
Does not help to get your mind around the project
Does not help get a team and other stakeholders to buy into the project
Does not show a complete hierarchy of the project, even with indentation
Does not result in a clear understanding of the project by all the stakeholders

Here are just a few benefits of why WBS is better than a list:

The way a list, the method on the right, is created in the way it displays information makes it easy to overlook some deliverables. In contrast, the construction of the WBS chart on the left provides a structured vision for the project and helps to ensure that nothing slips through the cracks (i.e., no deliverables are forgotten).
A list can be cumbersome and does not allow you to break down a large project into small enough pieces. With a WBS, you can easily break down the work into work packages, and the WBS shows how the work packages are delivered.
A list is usually created by one person, whereas the WBS is created with input from the team and stakeholders. Involving the team and stakeholders helps gain their buy-in, and increased buy-in leads to improved performance. In contracts, a list often makes people weary of the project because they do not understand the project by looking at the list, nor do they know how it was created.
The process for creating a WBS allows the team to walk through the project in their minds and thus improves the project plan. The execution of the project is typically easier and less risky as a result.
Being involved in the creation of the WBS helps people better understand the project and makes it feel more achievable.
A WBS shows a complete hierarchy of the project, making it easier to see how one deliverable relates to another. A list is just a list.

So will this be on the exam? Not directly, but you will need to fully understand a WBS, and this exercise describes aspects of using a WBS that many people do not understand.