Forest decline, like this, is a new phenomenon that is directly related to the activities of man on earth. high altitude defoliation is common in the eastern united states, europe, and japan due to the effects of a. drought. b. acidic clouds. c. global warming. d. ozone depletion.

B. acidic clouds
Explanation: High altitude defoliation of evergreen trees is attributed to the presence of acidic clouds. The acidic cloud mist causes calcium leeching which in turn causes freezing damage in current needle growth. Simply put, the new needles die.

The scientific method is a series of steps followed by scientific investigators to answer specific questions about the natural world. it involves making observations, formulating a hypothesis, and conducting scientific experiments.the steps of the scientific method are •observation-the first step of the scientific method involves making an observation about something that interests you•question-once you've made your observation, you must formulate a question about what you have observed. •hypothesis-once you've made your observation, you must formulate a question about what you have observed. •experiment-once you've developed a hypothesis, you must design and conduct an experiment that will test it.•results-the results are where you report what happened in the experiment. •conclusion-the final step of the scientific method is developing a conclusion.i hope that this you : )