Final answer:
The author's use of metaphor in describing problem-solving as a 'productive fire' indicates a tone that is passionate and encouraging, which aligns with option B, showing her passion and encouraging others to engage in problem-solving.
Step-by-step explanation:
In paragraph 5, the author's choice of describing problem-solving as a "productive fire" fed by the "kindling of enthusiasm" suggests a passionate and encouraging tone. The metaphor employed implies a dynamic and positive process of engaging with challenges, where enthusiasm acts as a catalyst, igniting a creative and fervent approach to finding solutions.
Therefore, the correct answer to how this word choice reveals the author's tone in the article is option B. It develops her passion through imagery, encouraging others to join her. This language does not indicate anger or frustration, as per option A, nor does it specifically focus on holding conferences, as per option C. Neither does it reflect on the author's excitement about inspiring others, which option D suggests.
It's evident that the author is using strong descriptive diction to create an engaging and professional tone. Such use of language aligns with rhetorical strategies that employ pathos—appealing to the reader's emotions, as seen in other parts of her work where she encourages understanding of her position and action towards change.