According to the principles of natural systems, which statement is correct?

The statement that complex systems depend on only a few survival factors is correct because it aligns with the understanding of ecological dynamics and the interdependence within natural systems. In complex ecosystems, a limited number of critical factors—such as availability of resources, presence of key species, or environmental conditions—are often sufficient to sustain the entire system. These factors can significantly influence the health and stability of the ecosystem, demonstrating that while systems are intricate, they can remain resilient and functional through the interplay of a few essential elements.

This principle is foundational when assessing ecosystem management and conservation strategies, as it highlights the importance of identifying and maintaining these key survival factors. If these critical components are disrupted or removed, it may lead to significant changes or even collapse of the entire system, reinforcing the idea that complexity in natural systems can emerge from a relatively few significant influences.

The other statements do not accurately reflect principles of natural systems; for example, extinction rates are indeed influenced by population density, and the continuity of life is closely tied to the cycling of essential elements like carbon and nitrogen. Additionally, while human foresight plays a role in our ability to enact changes, it does not strictly limit how we can affect the Earth, suggesting a more nuanced relationship.