Question

find the missing link/item: ? coral reefs mangrove plankton lobsters ○ freshwater ecosystem ○ marine ecosystem ○ grassland ecosystem ○ forest ecosystem

Explanation:

Coral reefs, mangroves, plankton, and lobsters are all components of the marine ecosystem. Freshwater, grassland, and forest ecosystems do not include these marine - specific elements. So the missing link should be the Marine ecosystem as it encompasses all the given items.

Answer:

B. Marine ecosystem