Many United States weather maps throughout the year will look similar to the one above. Which explanation best describes the cause of this phenomenon ? Evaporation of ocean water creates fronts that approach the United States from both coasts . The west coast of the United States is normally colder than the east coast . Ocean waves cause movement in the air masses in the same direction . The unique shape of the United States land mass cause these weather patterns to occur regularly

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.