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When we destroy a forest, we destroy an ecosystem. It is because ecosystem constitutes of both abiotic and biotic components. The biotic components constitute all the living organisms present in the ecosystem, i.e. plants and animals. Whereas, abiotic components constitute the environmental factors like air, soil, water etc. When a forest is destroyed, it results in the loss of food and habitat of wild animals, due to which the population of wildlife is threatened. The loss of forest also results in deforestation, which affects the environment by raising the temperature and causing a flood. So, the correct option is A.

An ecosystem consists of the biological community of living organisms that occurs in some particular area and the physical and chemical factors that make up its nonliving or abiotic environment. There are many examples of ecosystems - a pond, a forest, an estuary, a grassland. 

The ecosystem is comprised of various food chains in which the organisms interact with each other. There is also the involvement of the non-living forms. The living form is the biotic component and the non-living forms are the abiotic components. The producers, consumers and decomposers are the biotic components. Sunlight, air and water are the abiotic components. 

An ecosystem includes living things in a given environment, their interaction with each other, and also with their non-living environment i.e., weather, earth, sun, soil, climate, and atmosphere. Thus the correct answer is option C.

Habitat is the environmental area where particular organisms live. Hence the size of the habitat determines the size of an ecosystem. More the number of the organism more the area will be covered and thus the size of the particular ecosystem increases.

Interaction between biotic and abiotic factors is called ecosystem. Study of ecosystem is called ecology. The study of interaction and habitat or organisms in certain area is called niche and major ecosystems is called bio-mes.

An ecosystem consists of biotic and abiotic omponents. Biotic or living things involve producer, consumers and decomposers. Abiotic or nonliving things involve air, water, soil. An area with very little water is called as xeric or desert ecosystem. A lentic ecosystem is an ecosystem which consists of still water. 

Ecosystem ecology is the study of living (biotic) and nonliving (abiotic) components of an ecosystem and their interactions within an ecosystem. Well known ecosystem ecologist is E. P. Odum. Eugene Pleasants Odum is well known for his pioneering work on ecosystem ecology. He wrote a book on 'Fundamentals of Ecology.'