Final answer:
Mary Kate does her science project on aquatic animals, specifically sharks and turtles. Aquatic animals provide insights into marine ecosystems and scientists study them through tagging and tracking programs like TOPP.
Step-by-step explanation:
Mary Kate does her science project on aquatic animals. Aquatic animals, such as sharks and turtles, can provide valuable insights into marine ecosystems and help scientists unlock the mysteries of the ocean. Through tagging and tracking programs like the Tagging of Pacific Predators (TOPP), researchers study migration routes, ecosystems, and species diversity in the ocean.