Q. Fill in the blank using the most appropriate option:
The word ecology, as given by a German biologist Ernst Haeckel in 1869, has its origin from the Greek word oikos meaning _____ and logos meaning to study.

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Solution:

The word ecology was given by a German biologist Ernst Haeckel in 1869, which has its origin from the Greek word oikos meaning habitat and logos meaning to study. A habitat is a place or environment where a plant or animal naturally or normally lives and grows.
The ecological niche of organisms represents, the resource it utilizes, its functional role in the ecological system, and the range of conditions that it can tolerate.