Answer:
  
Sleep apnea is a condition in which the patient or a person lost breathing during sleep. This occurs around 10 to 20 seconds or this period can be longer. It sometimes occurs during an arousal state. The person who is suffering from this problem may not aware that he/she has sleep apnea. It happened and they realize when they feel fatigued during their whole day. Many times person start treatment at the complaints of their partner. When they explain that they snored very loudly and in between for a short period they stop breathing. It is common among obese people and they snore very loud.  
- The sleep apnea is of two types:
- The obstructive sleep apnea
- The central sleep apnea
 
 
        
             
        
        
        
The answer would be Density.
        
             
        
        
        
The right answer is: constructivist approach.
This method of learning was developed by Jean Piaget and is based on the premise that students should be responsible and active participants in their own learning processes and not just to receive information passively.
The main characteristics of this learning method are the interaction and autonomy of the students and an example would be the realization of an experiment and the analysis of its results.
I hope this information can help you.
 
        
             
        
        
        
Creating a coalition of various groups to pass a bill 
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Answer:
Retreatism and Resistance
Explanation:
Considering the scenario described in Atanu's attitude toward tourists visiting his village exemplifies "Retreatism and Resistance"
Retreatism is the attitude in which an individual is resigned to stopping himself from achieving what he wanted to achieve. This is exemplified when Atanu refused to talk to the tourists and pretends not to communicate in English.
Again, Atanu exemplifies Resistance by "planning to lead an organized protest to stop the harassment of locals by tourists."