The discipline that applies ecological principles to returning degraded ecosystems to a more natural state is known
a. restoration ecologyb. thermodynamicsc. eutrophicationd. biogeochemistry

The correct answer is a. Restoration ecology

Explanation:

Restoration ecology was coined by John Aber and William Jordan in late 1980. Restoration ecology is the study of rehabilitation, recreation, restoration of a degraded and destroyed ecosystem. This restoration is achieved by human intervention.  

The different projects in this study included many different points like removal of non-native species, control of erosion, reforestation, re-vegetation, rehabilitation of native plants and animal species, etc.

Restoration ecology is important to control rapid environmental change and extinction of ecologically important species. So the right answer is a.

that is true   : ) hope this you