Vijayalakshmi T2020-09-122020-09-122013-02978-81-8209-348-5https://dspace.psgrkcw.com/handle/123456789/1437Environment plays a major role in the critical stages of the life cycle of the species. The species react to the environment changes and adjust structurally and psychologically. The environment also changes according to certain species-specific activities like growth, dispersal, reproduction, death and decay. All living organisms and the environment are mutually reactive, affecting each other in various ways.enEcotopiaEnvironmentEco-systemArticle