Geography • Physical GeographyMedium
In oceanography, what defines the euphotic zone?
A. The layer of the ocean where pressure exceeds 1,000 atmospheres
B. The upper layer of the ocean that receives sufficient sunlight for photosynthesis✓ Correct Answer
C. The benthic zone devoid of any oxygen and biological life
D. The deep trench zone characterized by hydrothermal vent activity
💡 Solution & Explanation
The euphotic zone represents the uppermost layer of aquatic ecosystems where sunlight penetration is sufficient to sustain net primary production through photosynthesis. Deep oceanic regions lacking light are termed the aphotic zone, while benthic zones refer strictly to the ecological region at the lowest level of a body of water. Oceanographic zones and marine ecology frequently appear in physical geography assessments.
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