Sustainable agriculture is focused on

Sustainable agriculture prioritizes practices that ensure long-term health and productivity of farming systems while minimizing negative impacts on the environment. Maintaining soil health is a core principle of sustainable agriculture, as healthy soil is essential for growing crops, supporting biodiversity, and capturing carbon. By focusing on practices that reduce chemical inputs, such as synthetic fertilizers and pesticides, sustainable agriculture aims to protect ecosystems and human health. These practices often include crop rotation, cover cropping, and organic farming methods, which not only enhance soil vitality but also promote a balanced ecosystem.

In contrast, the other options do not align with the principles of sustainable agriculture. Maximizing profit margins without regard to environmental impact can lead to practices that degrade land and water resources. Increasing the size of farming operations often promotes monoculture and can exacerbate issues like soil depletion and loss of local biodiversity. Lastly, decreasing biodiversity in crop production leads to increased vulnerability to pests and diseases, which runs counter to the resilience that biodiversity offers in agricultural systems. Thus, focusing on maintaining soil health and reducing chemical inputs is fundamental to achieving sustainability in agriculture.