Why do seeds not develop into seedlings if kept immersed in water?

Seeds do not develop into seedlings when immersed in water because they require a balanced environment that includes air, warmth, and proper moisture levels for germination. While water is essential for activating the seed's metabolic processes, excessive water can lead to oxygen deprivation, which is critical for seed respiration. Additionally, too much water can promote rot and fungal growth, further inhibiting seed development. Thus, seeds need a well-drained substrate to germinate successfully.