AP BIOLOGY

Detailed explanation-1: -Tropical rainforests are the most biologically diverse terrestrial ecosystems in the world.

Detailed explanation-2: -Tropical forests have the highest biodiversity and primary productivity of any of the terrestrial biomes.

Detailed explanation-3: -Hence tropical rain forests are the most species-rich biome on Earth. Because of a high plant diversity, tropical rain forests also contain huge collection of animals including various insects, amphibians, reptiles, mammals and birds.

Detailed explanation-4: -So the correct option is ‘tropical moist forests’.

Detailed explanation-5: -Tropical rainforests are unique in the high levels of biodiversity they exhibit. Around 40% to 75% of all biotic species are indigenous to the rainforests. Rainforests are home to half of all the living animal and plant species on the planet. Two-thirds of all flowering plants can be found in rainforests.