Which statement best describes the author's viewpoint in "The Thirsty Tree"? Agencies need to work more closely with individual farmers and environmentalists in the American Southwest. Various agencies have implemented plans that were not based on good evidence or a holistic view of the ecosystem. Agencies need to stop groundwater pumping and the construction of new dams to restore the American Southwest. O Tremendous progress has been made in eliminating an overgrowth of salt cedar trees in the American Southwest.​