Question

the main focus of sustainable agriculture is: maintaining long - term land productivity maximizing short - term yields using synthetic chemicals increasing land usage efficiency

Explanation:

Sustainable agriculture aims to meet present food and textile needs without compromising future availability. Maintaining long - term land productivity ensures ecological balance and resource conservation. Maximizing short - term yields (often via synthetic chemicals) can degrade soil. Increasing land usage efficiency is part of sustainability but not the main focus like long - term productivity.

Answer:

maintaining long - term land productivity