According to the Big Bang theory, the universe was once very dense and is now expanding. 
        
             
        
        
        
I'm pretty sure it was yellow fever.
        
             
        
        
        
energy is lost at each level of consumption so it’s simply not efficient to be a 5th + level consumer 
 
        
             
        
        
        
I think the correct answers are options C and D. Examples of science are a farmer consulting a weather almanac to decide the best time to plant a crop and a<span> drug manufacturer testing a drug to determine its safety. These things require the knowledge on science and its related subjects.</span>