Answer:
the Great Blue Heron is the most likely tertiary consumer in the Everglades food web. The Great Blue Heron feeds on fish, amphibians, reptiles, and other small animals, making it a predator of secondary consumers.
On the other hand, the Southern Leopard Frog is a secondary consumer that primarily consumes insects and other invertebrates. The Eastern Mud Turtle is a primary consumer that feeds on plants, algae, and aquatic vegetation. The Grass Carp is also a primary consumer, primarily feeding on aquatic plants.
Based on their feeding habits, the Great Blue Heron is the best fit for the role of a tertiary consumer in the Everglades food web. However, it's important to note that the food web is a complex system and can vary based on factors such as habitat and prey availability.