Answer:A. is challenging but still allows for proper form 
Explanation:
When you want to increase strength you don't want to exhaust yourself but still you want to challenge yourself out of your comfort zone in a proper way.
You building muscles but you still want to ensure consistency without burning out.
Strength exercises challenges your ability to endure, for example holding a plank challenges your whole body and how long can you endure the position.
At the same time you have to do it properly to ensure that you obtain the right results .
If you don't hold it properly you may injure yourself or not get the desired results .
 
        
             
        
        
        
If a country is not able to produce some goods, it has to buy them somewhere else and bring them into the country - this is called importing, so the correct answer is b. 
Selling goods outside of the country is called exporting and giving them away would be called donating. 
        
                    
             
        
        
        
The Incan social and economic system described is called Mit’a.
Mit’a referred to a form of tribute to the Inca government in the form of labor. It was an Incan social and economic system which was significant to the Incan Empire as it allowed the state to control their subjects. According to the Mit’a rule, all male individuals including adolescent aged 15-20 were required to work certain number of days each year on a revolving basis to work on construction projects, mining, and the maintenance of buildings and roads and military service was also mandatory. Mit’a was a primary reason the empire was able to have so many useful agricultural and construction projects that enhanced the quality and convenience of life within the empire. The empire estimated that an individual requires 65 days in a year to work for their family and remaining days were devoted to working as directed by the empire.
Learn more about Mit’a:
brainly.com/question/29307732
#SPJ4
 
        
             
        
        
        
Considering the available options, the events that could be a threat to a state’s sovereignty at the national scale while holding a region together at the global scale is "<u>Admittance into a supranational organization such as the European Union."</u>
<h3>What is a Supranational Organization?</h3>
A Supranational organization is a type of organization in which the members, usually the countries, surrender their power and autonomy on specific issues, precisely internal matters concerning all the members, to the organization's rulings.
The advantage of being a member of a Supranational organization is that it keeps countries together and formidable on a world scale.
For example, the European Union, where all the members vote to make decisions on issues concerning all the organization members.
Hence, in this case, it is concluded that the correct answer is option C. "<u>Admittance into a supranational organization such as the European Union."</u>
Learn more about European Union here: brainly.com/question/13929900
 
        
             
        
        
        
I think it’s the very last one to redraw it’s borders,