Article A explains that adult sea otters spend more than a third of their day grooming, but in Article B, the author explains that adults spend most of their day caring for their young are the authors' points of view.
<h3>What is sea otters?</h3>
The sea otter is a marine mammal found along the northern and eastern North Pacific Ocean coasts. 
Adult sea otters weigh between 14 and 45 kg 30 and 100 lb, making them the heaviest weasel family members but among the smallest marine mammals.
Thus option B is correct.
For more details about click  sea otters, here:
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Jack Block found that 23-year-old who described themselves as being politically conservative were likely to have been described as <u>guilty and anxious</u> at age 3.
<u>Explanation</u>:
Guilt is a feel expressed by the person, when he/she feels they had done something wrong. A person will feel guilt, when he violates his own ethics or morality. The unethical behavior of the person may cause physical or psychological pain to others.
The person feels nervous and uncomfortable when he is anxious. This kind of person is conservative in nature. They are always seen to be worried and stressed. Anxious people often gets fear on facing the crowd.
 
        
             
        
        
        
Answer:
rhine i thin ( : sorry if im wrong 
Explanation:
 
        
             
        
        
        
The decloration of independence was signed
        
                    
             
        
        
        
Answer:
Class room environment ( i.e the type of wall)
Explanation:
Here, it is given that the two identical courses are being taught to the students that means the course is not varying.
Also, the same researchers are teaching the students that means the researchers are also not variables.
Therefore, the only thing that is varying in the whole research is the class room environment i.e the the walls of the classrooms.
In the glass walls there will be more distractions while in the opaque walls it will not be much.
Therefore, the classroom environment is the independent variable in the research.