Concept:Dense, luxuriant, broad-leaved vegetation with high plant diversity indicates a hot, wet equatorial climate.
Explanation:The phrase “dense and luxuriant” suggests tall, closely packed trees with abundant foliage.
A great variety of plants with broad leaves is a typical feature of regions receiving heavy rainfall throughout the year.
These conditions are found in the tropical rain forest, not in savannah grasslands, Mediterranean woodlands, or warm temperate forests.
Hence, the description matches the tropical rain forest vegetation belt.
Answer:B. tropical rain forest