Which of the following zones has a lesser amount of light compared to the Photic zone?

The correct answer is the Aphotic zone because this zone is characterized by a significant lack of light compared to the Photic zone. The Photic zone is the upper layer of the aquatic environment where sunlight penetrates sufficiently to allow for photosynthesis, making it rich in light and biological activity.

As one moves deeper into the water, the intensity of light diminishes, leading to the formation of the Aphotic zone, which is below the reach of sunlight. This zone typically lacks photosynthetic organisms because the light levels are insufficient for them to thrive. Consequently, the energy supply in the Aphotic zone primarily comes from organic matter that falls from the upper layers, rather than from photosynthesis.

Other zones, such as the Euphotic zone, are often considered part of the Photic zone, where light is abundant, and photosynthetic activity occurs at its peak. The Neritic zone refers to the coastal region where light penetration is still adequate, often overlapping with the Photic zone. Thus, compared to these other zones, the Aphotic zone indeed has a significantly lower level of light.