Which biome is representing the tropical forest?

The correct answer is Option (3) → D

Option (3) D — Correct. Tropical forests have the highest temperature and the highest rainfall of all biomes. In the figure, biome D sits at that warm, wet corner, so it stands for the tropical forest.

Note: This question is from the topic “Organism and Its Environment” in Chapter 13, Organisms and Populations, of the pre-rationalised NCERT book. This portion is not in the present NCERT book, where the chapter is now Chapter 11, Organisms and Populations. The extract below is from the pre-rationalised edition.

NCERT Extract (Pre-rationalised edition, Chapter 13, Organisms and Populations):
Organism and Its Environment – “… 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. You may have learnt in earlier classes 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 (Figure 13.1).”