The correct answer is option C, that is, sustainable forestry.
A sustainable forestry refers to a forest, which is carefully administered so that as trees are cut, they are substituted with seedlings, which ultimately develop into mature trees. This is a skillfully and carefully managed system.
Sustainable forest management refers to the management of forests on the basis of the principles of sustainable development. Sustainable forest management has to maintain an equilibrium between the three prime pillars, that is, economic, ecological, and socio-cultural.
The United States Environmental Protection Agency (EPA) defines point source pollution as any contaminant that enters the environment from an easily identified and confined place.
The classic image of a factory smokestack belching smoke and fumes into the air or an industrial discharge pipe pouring contaminated liquid into a river are some great examples of point source releases to the environment.
Nonpoint source (NPS) pollution is pollution resulting from many diffuse sources, in direct contrast to point source pollution which results from a single source.