Here's why:
* Crust: Silicon is the second most abundant element in the Earth's crust, making up about 27.7% of its mass. Oxygen is the most abundant, at about 46.6%.
* Oceans: While oxygen is the most abundant element in the oceans, silicon is dissolved in the water as silicates, playing a crucial role in the formation of diatoms and other marine life.
* Atmosphere: While nitrogen is the most abundant element in the atmosphere, silicon is present in trace amounts, primarily in the form of dust particles.
Therefore, silicon is the second most abundant element in all three environments.
