Soil forms from parent rock or organic material weathered by climate and microorganisms. What is its primary role?

The primary role of soil is to support plant growth, making it essential for terrestrial ecosystems. Soil serves as a medium for plants to anchor their roots, providing stability and structure. Additionally, it holds nutrients and minerals that are vital for plant nutrition. The organic matter within the soil also contributes to the formation of humus, which enhances soil fertility and helps retain moisture, thereby creating an optimal environment for plant development.

While soil does facilitate water retention, provide habitat for organisms, and play a role in air filtration, these functions are secondary to its central role as a growth medium for plants. The health of flora in an ecosystem directly correlates with soil quality, as healthy soil leads to robust plant life, which in turn supports other organisms and the overall ecosystem.