Question

Which part of the world has a high density of organisms?
A. Grasslands
B. Savannahs
C. Deciduous forests
D. Tropical rain forests

Answer 1

Hint:The ratio of the total number of organisms to the total area is referred to as population density.

Complete step by step solution:
 In general, population density is expressed in square kilometers. An ecosystem known as a grassland is one where grasses and other herbaceous (non-woody) plants predominate. It is also known as a transitional environment because grassland ecosystems, where there are neither enough trees for a forest nor enough, are dominated by grass with few to no trees. The interior of continents, in moderate latitudes, is where grassland biomes can be found. They might have dry subtropical climates or humid continental climates. The grasslands in Argentina, South America, are referred to as pampas. There, the weather is muggy and humid.
The most common types of forests in India are tropical deciduous forests. They are also known as monsoon woods, and they cover a region that receives between 200 and 70 cm of precipitation annually. During the dry summer, trees in this forest type lose their leaves for roughly six to eight weeks. A forest that grows in tropical regions with significant rainfall is known as a tropical rainforest. It has a wide variety of plant and animal species. Less than 2% of the surface of the Earth is covered by rainforests. About 50 to 70 percent of all life species on our planet are found there.
Ecosystems are made up of both living and nonliving elements, such as air and water. There are many different ecosystems, including pond, forest, and grassland ecosystems. The maximum biomass or density of creatures is found in the forest habitat. Sugarcane fields, coral reefs, and tropical rain forests all comprise the forest environment. Of these, tropical rain forests have the greatest concentration of living things.
So, option (D) is correct.

Note:
Deserts are undoubtedly an example of ecosystems with little biodiversity. The least biodiverse regions include the icy deserts of Antarctica and the Gobi basin in central Asia. Tropical rain forests, like those found in South America's Amazon basin, are an example of ecosystems with great biodiversity. These kinds of woods are also prospering on Indonesian islands and in several regions of central Africa.