Provide a simple trophic-level outline of a typical coastal food web including producers, primary consumers, secondary, and tertiary consumers.

• A. Producers: kelp; primary consumers: zooplankton; secondary: small fish and invertebrates; tertiary: larger fish and seabirds.
• B. Producers: seagrasses; primary consumers: herbivorous crabs; secondary: squid; tertiary: seals.
• C. Producers: phytoplankton, macroalgae, seagrasses; primary consumers: zooplankton, herbivorous snails; secondary consumers: small fish and invertebrates; tertiary consumers: larger fish and seabirds.
• D. Producers: phytoplankton; primary consumers: seabirds; secondary: manatees; tertiary: dolphins.

Answer: (C)