Final answer:
The future of the biosphere is primarily influenced by climate change, human population growth, and resource depletion. These factors affect ecosystems, biodiversity, and the availability of essential resources like fresh water and food.
Step-by-step explanation:
Three major factors that will affect the future of the biosphere include climate change, human population growth, and resource depletion. Climate change can alter precipitation patterns, cause sea level rise, and impact ecosystems and biodiversity. The growth of the human population increases demand on natural resources, leading to habitat destruction and greater carbon emissions. Depletion of resources, such as fossil fuel reserves, can trigger changes in energy use, economic structures, and technologies. These conditions pose challenges to the health, food supply, fresh water supplies, and overall infrastructure essential to a sustained and healthy biosphere. Furthermore, the biosphere is influenced by various abiotic factors, such as temperature, rainfall, insolation, and atmospheric carbon dioxide levels that affect its overall ability to support diverse life forms.