The correct answers:
Biosphere is the part of lithosphere, hydrosphere and atmosphere where life is possible. It is a global ecosystem in which biotic (living) and abiotic (non-living) components interacts. During photosynthesis, green plants which are biotic components interact with abiotic comments such as sunlight, carbon dioxide and water to make food. This process is called photosynthesis. During photosynthesis oxygen is released into the atmosphere as by-product.