Mangroves are the dominant and most common plant species found in estuarine habitats, which are coastal areas where freshwater rivers meet the saltwater sea. These plants are specifically adapted to tolerate the high salinity and low-oxygen, muddy conditions present in these environments.

A. Plantain is a terrestrial, tropical plant and a major food staple, not an estuarine or salt-tolerant plant.

B. Gmelina is a genus of various tree species found in terrestrial, non-saline environments across parts of Asia, Africa, and Australia.

C. Iroko is a large hardwood tree species native to tropical Africa, found in inland forests, not estuarine habitats.