Which of the following are rooted floating plants?

Rooted floating plants are those that have their roots submerged in the water while the rest of their structure, including leaves and flowers, floats on the surface. The plants classified under this category typically have adaptations that allow them to thrive in aquatic environments.

The water lily and spatterdock are quintessential examples of rooted floating plants. Water lilies have broad, often rounded leaves that float on the surface, while their roots are anchored in the sediment below. Similarly, spatterdock, also known as yellow cow lily, has large, paddle-shaped leaves that float, with roots that secure it in the substrate.

In contrast, the other choices feature different types of aquatic plants. Duckweed and watermeal are not anchored to the substrate and float freely on the water's surface without significant root systems. Cattails and bulrushes are emergent plants, which means they grow primarily out of the water rather than floating. Eurasian watermilfoil and algae usually do not fit into the rooted floating category, as milfoil can be submerged and algae tend to float freely or grow attached to surfaces without a rooting mechanism.

Thus, the identification of water lily and spatterdock as rooted floating plants is based on their growth habits and structural adaptations that allow them to thrive