Explanation
Correct option is D) Lemna
During hydrarch succession which occurs in aquatic habitat, the successional series progress from hydric to mesic conditions. Submerged hydrophytes are the transitional community in this succession. It undergoes sequential changes to reach at climax. Submerged hydrophytes are the plants which have their roots anchored in the mud at the bottom of the water body. Examples of submerged hydrophytes: Myriophyllum, Hydrilla, Vallisneria, Ceratophyllum, Utricularia, etc.
