In the respiratory system, the main difference between the conducting portion of the respiratory system is its parts and function. The former contains air-transmitting passages (with respiratory system acting as a filter) as well as special portions functioning for smell, phonation and alimentation. The latter however, is a location where actual gas exchange occurs which of course contains different parts than the conduction portion.
Fungus grows best in dark wet places where the sun does not shine... Therefore the sun would most likely discourage growth of fungus!
The answer is B
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