The Vietnam War was a violent battle that lasted for many years and had the controversial participation of the USA. In this conflict, the USA used state-of-the-art equipment and has more weapons to use and guarantee victory in the war. However, the Vietnamese army, even at a disadvantage in terms of armaments and technology, came out victorious because they had the advantage of the region's climate and topography.
Vietnam had a topography with little linearity and extensive vegetation, which allowed the Vietnamese to use their knowledge about the place and hide various traps that were not located by American equipment and caused American soldiers to be captured.
 
        
             
        
        
        
Answer: John Deere made a new steel plow to make turning the prairies into farmland much easier.
Explanation:
The climate of the Midwest Region enhances its farming as it has a good climate and also, the region has a fertile, and deep soil made up of vital nutrients for the crops that are planted. Some of the crops that were cultivated include corn, squash, sunflowers, beans, sweet potatoes, etc.
A positive development of early farming in the Midwest was that John Deere made a new steel plow to make turning the prairies into farmland much easier. This was vital as it was used in the breaking down of tough soil 
 
        
             
        
        
        
Plant cells have a cell wall , chloroplasts , and a vacuole , animal cells do not not.
        
                    
             
        
        
        
Answer:
Communication shows a leader´s ability to express and listen to ideas.
Explanation:
Human beings innately possess social needs, such as belonging to a society, relating to them, belonging to groups, among others. Communication is a key element and in order to carry out this need, organizations keep communicating with each other, internally or externally.
One of the main characteristics of a leader is the ability to communicate and achieve positive influence among the people in his charge. If there is good communication, there is good leadership, because of this communication is essential for an effective leadership. 
 
        
             
        
        
        
Answer: Pre-authorization
Explanation:
Managed care plan is the plan that contains insurance about the medical facilities and health care that is provided to an individual by health care providers. This plan is provided to people at low costs through providers and the services of healthcare is also at low amount.
Pre-authorization is the prior approval that is provided by the health insurer that the particular medical services and care will be provided to the individual under the plan.
If this pre-certification is not obtained in managed care plan then this can lead to the reduction in plan's medical care coverage or no coverage at all in healthcare field.