Why is photic zone CALLED the layer of life?

The photic zone is called the "layer of life" because it is the uppermost layer of the ocean where sunlight penetrates, enabling photosynthesis. This process supports a diverse array of marine life, including phytoplankton, which form the base of the oceanic food web. The presence of light in this zone fosters the growth of various organisms, making it crucial for sustaining marine ecosystems. Therefore, the photic zone plays a vital role in the productivity and biodiversity of ocean life.