Explanation:

Silviculture is the practice of controlling the establishment, growth, composition, health, and quality of forests to meet diverse needs and values.
Cage and pen culture, like other methods of rearing fish, may be conveniently classified as extensive, semi-intensive, or intensive on the basis of feeding.
Mariculture is a specialized branch of aquaculture involving the cultivation of marine organisms for food and other products in the open ocean, an enclosed section of the ocean, or in tanks, ponds or raceways which are filled with seawater.
Permaculture is a system of agricultural and social design principles centered around simulating or directly utilizing the patterns and features observed in natural ecosystems.