Explore how physical and human factors influence organisms dispersion. And explain any two bio-geographical areas in India.

The dispersion of organisms across the Earth's surface is influenced by a complex interplay of physical and human factors. Environmental geography helps in understanding these factors, which determine species distribution patterns, biodiversity, and ecological balance.  

### Physical Factors Influencing Organisms' Dispersion  
Several natural elements shape the distribution of organisms:  

1. Climate – Temperature, precipitation, humidity, and sunlight availability determine where organisms can survive. For instance, tropical rainforests with high temperatures and rainfall support rich biodiversity, whereas deserts with extreme heat and dryness support only drought-resistant species.  

2. Topography – The landscape, including mountains, plateaus, and valleys, affects species movement and adaptation. Mountain ranges like the Himalayas create physical barriers, leading to unique species on either side. Elevation changes also influence vegetation and animal habitats.  

3. Soil and Geology – Different soil types provide varying nutrients essential for plant growth, directly influencing herbivores and higher trophic levels. ____ ___ ___ _____ ___.
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