Answer: b. recreation
An ecosystem is a community of living organism and their surrounding physical environment. The physical environment includes non-living components like sunlight, soil, water and minerals. A human society derives many benefits from a natural biome including one or more ecosystem like food, shelter, water, animal and plant products. But it also receives other benefits like recreation activities like boating, hunting, tracking, bird watching. These recreational activities helps human society to explore the beauty and important facts of nature. Human society can know about different types of floral and faunal species, naturally producing lakes and ponds, different colors and components of soils. All these activities increases knowledge, relaxes and energieses mental and physical health.