Answer:
Marine Biology
Step-by-step explanation:
Sofia must study marine biology if she intends to take care of marine animals like dolphins and other sea mammals. She can then enter into the specialization of marine biology known as Ichthyologists where study and research are conducted specifically on fish and sharks. Marine biology will help her to understand the anatomy of these animals in depth and also the internal metabolic/physiological processes. She can also guide people like aqua trainers and caretakers in taking care of these animals properly.