In which of the following situations would transitions be most useful?

Transitions are words, phrases, or sentences that help to connect ideas smoothly throughout a piece of writing. They guide readers through the text, illustrating the relationship between different points or sections.

In the context of drafting a formal report, the use of transitions is particularly essential. Reports often contain complex information and multiple sections that need to be clearly articulated. Transitions help to ensure that the reader can easily follow the logic and flow of the argument or findings presented. They serve to introduce new sections, indicate shifts in topic, summarize information, or provide examples, which is crucial for maintaining clarity and coherence in formal documents.

In contrast, other options may not require the same level of structured connectivity. Poetry often emphasizes rhythm and emotional impact more than logical flow. A list is typically straightforward and does not demand transitions, and while articles may benefit from transitions, they can vary in style and structure depending on the audience and purpose. Therefore, formal reports are the situation where transitions are most beneficial for enhancing clarity and understanding.