He total number of species living in a particular area is referred to as its o biosphere o biome o biotic o biodiversity

The  total number of species living in a particular area is referred to as its Biodiversity .

Explanation:

Biodiversity -

Biodiversity is defined as the variability and the variety of life existing on the planet Earth . Biodiversity measures the variation in the species , genetics and the ecology of the Planet . In the terrestrial level , the biodiversity is greater near the equator , due to warmer climate and higher level in production .

The biodiversity is not uniformly distributed on the planet , and is basically richer in the tropical region . Less than 10 percent of the Earth's surface is covered by the tropical forest ecosystems and contains around 90 percent of the world's species .

The diversity of marine life is higher near the Western pacific and in the mid latitude band , where the sea surface temperature is highest .

because there are alot of mountains