Final answer:
The introduction should underscore Sylvia Earle's global significance. An effective introduction might connect her work as an oceanographer or marine biologist to the broader endeavor of protecting life on Earth, rather than just stating her profession or expressing the wonder of the oceans.
Step-by-step explanation:
The introduction of an article plays a critical role in supporting the central idea by setting the context for the reader. In the case of an article about Sylvia Earle, the introductory paragraph would aim to highlight why she is significant to the world. If the introduction suggests that Sylvia Earle is an oceanographer, this would establish her professional identity but might not fully convey her global importance. If it connects Sylvia Earle's work to protecting life on Earth, it would more directly support the central idea that she is vital to the world as her efforts contribute to the well-being of our planet. Mentioning her as a marine biologist would be similar to stating her as an oceanographer in the sense of establishing her expertise, but without directly linking to her global impact. Finally, if the introduction shows that oceans are wonderful and fascinating to explore, it could set the stage for why Sylvia Earle's explorations are essential but does not directly tie her work to global importance unless it specifically relates her discoveries to broader environmental or scientific achievements.