Sustainability is defined as the use of Earth's renewable and nonrenewable natural resources in ways that do not constrain resource use in the future.

Sustainability is defined as the use of Earth's renewable and nonrenewable natural resources in ways that do not constrain resource use in the future.

• A. Conservation
• B. Sustainability
• C. Preservation
• D. Afforestation

Answer: (B)

The main idea here is that sustainability means using Earth’s resources in a way that doesn’t limit future generations’ ability to meet their needs. It involves balancing present demands with the preservation of soil health, water quality, biodiversity, and the long-term viability of economic and social systems. That makes the statement fit best because it explicitly frames resource use as something that should not constrain future options. Conservation focuses on reducing waste and protecting resources, but it doesn’t always spell out maintaining future options. Preservation aims to keep environments unchanged and often restricts use, which is narrower. Afforestation is a specific practice, not a definition of how we use resources overall.

The main idea here is that sustainability means using Earth’s resources in a way that doesn’t limit future generations’ ability to meet their needs. It involves balancing present demands with the preservation of soil health, water quality, biodiversity, and the long-term viability of economic and social systems. That makes the statement fit best because it explicitly frames resource use as something that should not constrain future options. Conservation focuses on reducing waste and protecting resources, but it doesn’t always spell out maintaining future options. Preservation aims to keep environments unchanged and often restricts use, which is narrower. Afforestation is a specific practice, not a definition of how we use resources overall.