Sodium chloride is an atomic solid. it dissolves easily in water. which property of water allows it to dissolve nacl

Water is known as a "Universal Solvent" meaning that it has the ability to dissolve almost anything. Specifically, it is a "polar solvent" which means its has both a positive and negative pole and can attract an ionic compound like salt (NACL) which also has a positive and negative charge. 

Thus it is water's ionic property has allows it to dissolve NACL.

The return of the wolf to yellowstone national park will probably affect the bird population to some degree, not significantly. while wolves will hunt birds when necessary, they prefer to hunt larger prey. the bird population will most likely only be affected when hunting is scarce for the wolves. birds of prey will also probably not be affected as much as other birds who spend more time on the ground hunting for food as the tend to spend more time in the air or in trees since they do not need to stay on the ground for long due to the nature of the way they hunt.