Question

Sustainability means developing practices which protect the environment while also providing for human needs. Which of the following changes would be most helpful in achieving sustainable agriculture?
Clearing land for agriculture by cutting down trees instead of burning them
Rotating crops to replenish the soil with nutrients
Tilling the ground to remove weeds and create uniform crops
Growing crops that produce only renewable resources

Answer 1

Rotating crops to replenish the soil with nutrients

Sustainability means developing practices which protect the environment while also providing for human needs. 
NOT:
Clearing land for agriculture by cutting down trees instead of burning them
Rotating crops to replenish the soil with nutrients
Tilling the ground to remove weeds and create uniform crops