Final answer:
The statement is true as wetlands are differentiated from other ecosystems by their hydrology, hydrophytic vegetation, and hydric soils, with emergent vegetation being a key feature.
Step-by-step explanation:
The statement that the primary thing that distinguishes wetlands from other land forms or water bodies is the vegetation of aquatic plants adapted to the unique hydric soil is true. Wetlands are environments with soil that is either permanently or periodically saturated with water. Different from lakes or ponds, wetlands are characterized by emergent vegetation, which includes wetland plants that are rooted in the soil with parts of the plant extending above the water's surface. The types of wetlands, such as marshes, swamps, bogs, and salt marshes, all share three characteristics: their hydrology, hydrophytic vegetation, and hydric soils, making them unique ecosystems.