Read the followitng passage and mark the letter A, B, C, or D to indicate the correct word or phrase that best fits each the numbered blanks.

Sustainable agriculture is farming in sustainable ways (26) ______ meet society's present food and textile needs, without compromising the ability for current or future generations to meet their needs. It can be based on an understanding of ecosystem services. There are (27) ______ methods to increase the sustainability of agriculture.   

When developing agriculture within sustainable food systems, it is important to develop flexible business process and farming practices. Agriculture has an enormous environmental footprint, playing a significant role in causing climate change, water scarcity, water pollution, land degradation, deforestation and other processes; it is simultaneously causing environmental changes and being impacted by these changes.  (28) ______, sustainable agriculture consists of environment friendly methods of farming that allow the production of crops or livestock without damage to human or natural systems. It involves preventing adverse  (29) ______ to soil, water, biodiversity, surrounding or downstream resources.   

Developing sustainable food systems contributes to the sustainability of the human population. For example, one of the best ways to (30) ______ climate change is to create sustainable food systems based on sustainable agriculture. Sustainable agriculture provides a potential solution to enable agricultural systems to feed a growing population within the changing environmental conditions.

Sustainable agriculture is farming in sustainable ways (26) ______ meet society's present food and textile needs,