Answer:
B.) Carbon and Hydrogen
Explanation:
Lactose is a carbohydrate, and carbohydrates are primarily made of carbon and hydrogen chains.
 
        
             
        
        
        
Two traits that represent a sustainable society is an emphasis on egalitarianism - where there would be a tendency to strive towards a society of equals. Another would be an emphasis on using renewable energy. 
On the other hand, an unsustainable society would have an emphasis on using fossil fuels due to being cheaper and having an ever-increasing productions of goods, not considering how taxing this might be on the planet. 
        
             
        
        
        
An age-related change in the nervous system that can adversely affect nutritional status is decreased taste perception, hearing loss and vision loss. Aging refers to a multidimensional process in humans, the process of physical, and psychological, and social changes. As a population, older adults are more prone to age-related diseases, functional impairment, and physical inability that nay interfere with the maintenance of a good nutritional status. 
        
             
        
        
        
A statement that would be least likely used too describe variation is 
“Variation is something that moves” 
That is a least likely description.
        
             
        
        
        
Answer:
<em>Ultraviolet is a form of electromagnetic radiation with wavelength from 10 nm to 400 nm, shorter than that of visible light, but longer than X-rays. UV radiation is present in sunlight, and constitutes about 10% of the total electromagnetic radiation output from the Sun. </em>