"Leaf litter decomposes faster than in any other biome and as a result the soil surface is often almost bare. Apart from trees, the vegetation is largely composed of plant forms that reach up into the canopy vicariously, by climbing the trees or growing as epiphytes, rooted on the upper branches of trees." This is the most likely description of
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Answer: D. Tropical rain forests are hot and wet, so leaf litter decomposes very fast and the forest floor is often bare. Many plants are climbers (lianas) or epiphytes that grow on tree branches to reach light. This matches the description.
Watch for: Fast decomposition plus epiphytes is a signature of hot, wet climates.
Why the other options are wrong
- A. Wrong because cold coniferous forests have slow decomposition and thick litter.
- B. Wrong because dry deciduous forests are not rich in epiphytes and climbers.
- C. Wrong because mangroves are coastal and not known for epiphytes reaching the canopy.
Source to check: NCERT Class 11, Fundamentals of Physical Geography, Chapter 15 Life on the Earth; NCERT Class 11 India Physical Environment, Chapter 5
Answer from the official UPSC key. Written and fact-checked by AI against the official key. Spotted a mistake? Report it.