What is the difference between the population sizes of developing countries as compared to wealthier more developed countries? Which of these consumes more resources? What problems does the current rate of consumption pose to inhabitants
of China, India, and Europe?

Dr. williams conducted a survey in the mall, measuring the shopping habits of people ages 15, 25, 35, 45, and 55, with 10 people in each group. which of the following best describes her study? an experiment a cross-sectional study a case study a longitudinal study a double-blind study