The correct answer is (b), tropical rain forest biome. Tropical rain forests are the most biodiverse ecosystems on Earth, with an estimated 50% of all plant and animal species living in these forests. They are also home to a wide variety of ecosystems, including rainforests, mangrove forests, and cloud forests.
Temperate deciduous forests are found in the mid-latitudes of the Northern Hemisphere. These forests are characterized by their deciduous trees, which lose their leaves in the fall and grow new leaves in the spring. Temperate deciduous forests are home to a variety of plant and animal species, including deer, rabbits, squirrels, and birds.
Temperate grasslands are found in the mid-latitudes of both the Northern and Southern Hemispheres. These grasslands are characterized by their short grasses and lack of trees. Temperate grasslands are home to a variety of plant and animal species, including bison, prairie dogs, and coyotes.
Savannahs are found in the tropics and subtropics. These grasslands are characterized by their tall grasses and scattered trees. Savannas are home to a variety of plant and animal species, including lions, elephants, and zebras.
In conclusion, tropical rain forests have the largest biodiversity of any biome on Earth. They are home to a wide variety of ecosystems and plant and animal species.