Alligator A- Producer Primary Consumer
B-Secondary Consumer
C-Tertiary Consumer
D-Decomposer

C-Tertiary Consumer

Explanation:

The diets of tertiary consumers may include animals from both the primary and secondary trophic levels. Like secondary consumers, their diet may also include some plants. Examples of tertiary consumers include Hawks, Alligators and Coyotes. Hawks feed on small mammals, lizards and snakes.