Final answer:
Photosynthesis is vital for all life forms by converting sunlight into energy and releasing oxygen. Animals, like humans, rely on plants and photosynthetic organisms for their energy needs.
Explanation:
Photosynthesis is crucial for all life on Earth as it is the only process that can convert sunlight energy into glucose, providing energy for organisms. This process also releases oxygen into the atmosphere, which is essential for animals' respiration needs. Animals, including humans, directly or indirectly depend on plants and other photosynthetic organisms for their energy requirements.
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