Complete the passage.
Natural _______(a)______ consists of air, atmosphere, water, land, living organisms, etc. Continuous interactions occur between ________(b)_________ and abiotic factors. Their interaction are very important. ________( c )________ is also affecting the natural environment directly of inderctly. Basically, environment consists of two basic factors-1. Biotic factors, 2. Abiotic factors. The science that deals with the study of interaction between biotic and abiotic factors of the environment is called as _________(d)_________ . Basic functional unit used to study the ecology is called as ______(e)________

Explanation

(a) environment (b) biotic ( c ) Artificial environment (d) ecology ( e ) ecosystem