Abandoning land as soon as the soil begins to degrade
        
             
        
        
        
Answer:
a. subcultures
Explanation:
A subculture is a culture within a larger culture that has beliefs and norms different from the larger culture.
The old order Amish and the youth culture are both subcultures in the United States. The Old Order Amish are a group of traditionalist churches known for plain dressing and simple living. The youth culture describes the way children,teenagers and young adults live such as their norms and common practices. 
 
        
             
        
        
        
Answer:
The most significant difference between the private and public sectors is the ownership of the organizations within them. In the public sector, organizations are owned and controlled by the government. Meanwhile, organizations within the private sector are owned and managed by individuals or private companies
 
        
             
        
        
        
Answer:
Behavioral intervention  study
Explanation:
The type of study that best describes the experiment in which a subject performs a cognitive task while in a brain scanner (e.g., fMRI), and researchers measure indirect changes in activity in specific regions of the brain is behavioral intervention study.