Which of the organizational methods does the writer use to develop the central idea?

Point-by-point organization involves comparing and contrasting different subjects by addressing one aspect at a time. While this method is useful for analytical writing, it does not effectively convey a sequential process. The question specifically asks for an approach that develops an idea through stages, which point-by-point does not provide.

The advantage-disadvantage organizational method presents the pros and cons of a topic, helping readers evaluate its merits. However, this approach does not follow a sequential structure; instead, it focuses on presenting differing perspectives without a clear progression. Therefore, it is not suitable for developing a central idea through steps.

Spatial order organizes content based on physical location or arrangement, often used in descriptive writing to create vivid imagery. Although this method can provide clarity, it does not align with the sequential development of a central idea that process order offers. Thus, it is not the correct choice.