Answer :
The word ecology is derived from two Greek words: (1) oikos and (2) logia. The word oikos means house and the word "logia" is a Greek word for knowledge. Thus, the phrase basically means, house knowledge. The answer is the first among the choices given.
House knowledge. Although the terms 'oikos' and 'logia' directly to house knowledge the term ecology has now come to be defined as the scientific study of organisms in relation to the environments in which they exist. This study encompasses both chemical and physical surroundings.
