What role does Silicon (S) play in plant health?

Silicon plays a crucial role in plant health, primarily by improving cell wall strength. This element contributes to the structural integrity and rigidity of plant cells by being deposited in the cell walls as silica (SiO2). This process not only increases mechanical strength but also enhances the plant's ability to withstand environmental stresses such as drought, lodging, and pest attacks.

Additionally, stronger cell walls can lead to improved overall plant vigor and resilience, helping plants maintain their shape and better resist physical damage. While Silicon does have some secondary roles in enhancing aspects like disease resistance and stress tolerance, its most significant contribution is in reinforcing cell structure, making the correct answer particularly relevant in discussions about plant health and growth.