Answer: Density of animal population
Step-by-step explanation:
The seagrasses are the photosynthesizing plants that grows in the photic zone as well as these are anchored by the mud or sand as they can be grown in the submerged condition. Most of these species undergoes pollination and complete their life cycle underwater. The biotic limiting factor can be define as the factor which limits the growth and abundance of the population of the species. This limiting factor is the biological agent like plant, animal or insect. In the given situation the density of animal population is the suitable option.