At sunrise, Anna notices that the Sun is low on the horizon. As the morning passes, she notices that the Sun continues to move higher in the sky. During the afternoon, the Sun moves lower in the sky until she can no longer see it. What causes the Sun to appear to move in this way?

Which of the following initial observations would more directly lead to this research study? a) ginko biloba is cost effective and also possesses heart-protective, antioxidant, anti-inflammatory properties. b) metformin is an effective treatment of patients with t2d, but shows side effects that complicate the disease state. c) over the past several years, the cost of treating t2d within the united states has increased dramatically. d) many plants contain molecules that improve the health and quality of life of patients with a variety of diseases like t2d. e) t2d affects millions of individuals in the usa and worldwide many of who could benefit from improved therapies.