Ecology at organismic level essentially is:
Molecular ecology
Environmental ecology
Morphological ecology
Physiological ecology
Physiological ecology -
Ecology at the organismic level is essentially physiological ecology which tries to understand how different organisms are adapted to their environments in terms of not only survival but also reproduction.
- wherein
e.g how the rotation of our planet around the Sun and the tilt of its axis cause annual variations in the intensity and duration of temperature, resulting in distinct seasons. These variations together with annual variation in precipitation (remember precipitation includes both rain and snow) account for the formation of major biomes such as desert, rain forest and tundra.
Correct option is 4