Final answer:
Swamps are notably different from marshes due to the dominance of trees and shrubs in their ecosystem. (Option D)
Step-by-step explanation:
Swamps differ from marshes in that swamps are dominated by trees and shrubs. While marshes are typically characterized by their grass and rush-dominated vegetation, swamps distinguish themselves with a more wooded environment. This means that a swamp's ecosystem typically revolves around a dense canopy formed by trees and shrubs, providing a unique ecological habitat.
Furthermore, this habitat often boasts slow water flow, just like marshes, yet it features a different array of plant and animal life thanks to the domination of woody plants. This distinction in vegetation composition between swamps and marshes contributes to the diverse ecological niches and biodiversity within these wetland ecosystems, reflecting the adaptability of flora and fauna to their specific habitat structures.