One should NOT sleep under a tree at night, because-

Correct option is C

The correct answer is (c) Carbon dioxide is released.
· Trees release carbon dioxide during the night due to respiration. Unlike during the day when photosynthesis occurs and oxygen is produced, at night, the absence of sunlight halts photosynthesis.
· As a result, trees take in oxygen and release carbon dioxide.
· High concentrations of carbon dioxide in the surrounding air can lead to health issues such as headaches and breathing difficulties.
Therefore, it is advised not to sleep under trees at night to avoid potential health risks