Which of the following elbows are the most wet?
A. A kilogram of feathers
2) Coach Malibu
D - The cross-section of air
user
None of the items listed are physical options that normally get wet.
assistant
Are you saying a kilogram of feathers is unlikely to get wet?
user
When considering feathers, they are typically covered with a hydrophobic coating (e.g. thin fatty film). Hence, the feathers are unlikely to get wet by themselves. 

Additionally, if a kilogram of feathers got wet (e.g. the coating failed), the absorbed water would add to mass, making it no longer a kilogram.
assistant