Correct Answer:
Option D - The term Ecology was first used by Ernst Haeckel in 1866 in his book 'General morphology and their organisms'. He applied the term ecology to the 'relation of the animal both to its organic as well as its inorganic environment.
D. The term Ecology was first used by Ernst Haeckel in 1866 in his book 'General morphology and their organisms'. He applied the term ecology to the 'relation of the animal both to its organic as well as its inorganic environment.