By MICHAEL IP. Forty years ago, on March 29, 1973, the United States ended its military involvement in Vietnam. Although the war would continue another two years, the South Vietnamese would no longer receive American assistance.
Ecology (from Greek: Î¿á¼¶ÎºÎ¿Ï, house, or environment; -Î»Î¿Î³Î¯Î±, study of) is the scientific analysis and study of interactions among organisms and their environment. It is an interdisciplinary field that includes biology, geography, and Earth science.
Ecological relationship. An ecological relationship is the relationship between an organism in its ecosystem. All organisms in an ecosystem are connected in one way or another. Each interaction depends on the one before it. Each population interacts with one another in a complex web of relations. Ecological relationships help better to describe how they are connected. There are ecological relationships in which two are oppositional and four are symbiotic. The oppositional relationships are predation and competition. The