The least amount of air movement in tropical rainforests is found in (the)
a. top canopy
b. second layer of the canopy
c. third layer of the canopy
d. none of the above

the answer is D. None of the above

Explanation:

First of all, the Canopy is only one of the layers of a tropical rainforest, which include, from top to bottom, the Emergent layer, the Canopy layer, the Understory layer, the Shrub layer, and the Forest Floor. Now, taking this into consideration, the least amount of air movement in tropical forests if found in the Forest Floor, where wind speeds have been found to be between 1 to 5 percent of the speeds recorded above the canopy. Since tropical rainforests consist of large and dense areas of broad-leaved trees, the wind passing above the dense canopy is immediately obstructed in the lower layers.