The primary source of fuel in South america is petroleum. 
-Agarvated
 
        
             
        
        
        
Answer:
Shale.
Explanation:
It is composed of silt or clay that has been compacted or squeezed together to form a solid rock.
 
        
             
        
        
        
Answer: 
1. Identify the problem as you see it.
2. Get the story straight - gather relevant data. ...
3. Ask yourself if the problem is a regulatory issue or a process issue related to regulatory requirements.
4. Compare the issue to a specific rule in ASHA's Code of Ethics. ...
5. Identify who has the power and control in the situation.
Explanation:
There are six broad ethical areas that need to be considered in your research. In this chapter, we will discuss voluntary participation, informed consent, confidentiality and anonymity, the potential for harm, communi- cating the results, and more specific ethical issues.
 
        
             
        
        
        
Tundras and deserts have a number of similarities such as their lack of water or how organisms that inhabit them are have special features to survive their extreme weather. Both are nearly unsustainable for human life and have just like the tundra, deserts have freezing temperatures at night.
        
                    
             
        
        
        
Answer:
The effects of the Industrial Revolution on agriculture can best be seen in the invention of mechanized farm equipment.
Explanation:
A is not correct because using animals as labor is an ancient method used in agriculture, and it is also in no way related to the Industrial Revolution.
B is not correct because it represents a planting method that doesn't necesseraly require any help from mechnization.
C is correct because the mechanized equipment is what was introduced in agriculture and propelled it to new levels.
D is not correct because the introduction of hybridized crops has been a result of the development in other spheres.