This action lowered morale. I know that it isn't the first one due to the fact that during the war they couldn't, and this is supported by when millions of dollars of cotton was stolen from the Confederates from the ports and given to the Union. That being said, it would put strain on the economy, no more export and import, supporting the other two, leaving only morale. Morale is a matter of opinion. Therefore, it can only be morale.
The Himalayas were harsh, and hard to pass through. The climates were cruel and cold. Although, Hindu Kush was easier to pass through and typically had fair climate.
The ant is 0.125 inches long. (1/8= 0.125)
The ant is 0.3175 centimeters long (there are 2.54 centimeters in an inch so 2.54x0.125= 0.3175)
The ant is 0.003175 meters. (move the decimal)
The ant is 3.175 millimeters. (move the decimal)
Hope this helps!