Final answer:
Gail could use the informative sentence that 'Dolphins eat small fish and squid' in her report to provide factual details about their diet and how they fit into the aquatic ecosystem.
Step-by-step explanation:
To make her report informative, Gail could use the sentence "Dolphins eat small fish and squid." This sentence provides factual information about the diet of dolphins, which is relevant to their biology and ecological role in their environment.
Dolphins are known for their intelligence and complex behaviors, such as using echolocation for navigation. Echolocation is a biological sonar used by dolphins to locate and identify objects by bouncing sound waves off of them and interpreting the resulting echoes. Furthermore, dolphins have a streamlined body and flippers which aid in their efficient swimming, and they have adapted to life in the water, which is evident in their reproductive and locomotion strategies.