Answer:
Cambrian
Explanation:
The earliest ancestors of about half of all extant animal phyla can be traced back to the CAMBRIAN explosion. 
 
        
             
        
        
        
Answer:
.Only state courts can hear civil cases.
Explanation:
 
        
                    
             
        
        
        
1. disease brought by colonists was a major factor. Kills millions
2. violent conflicts between the colonists and/or British forces against the natives
3. The westward expansion (there's a special name for it) Colonists kept colonizing deeper and deeper into the mainland until reaching the western sea coast. killing 10's of thousands on the way there
*millions died, possible around 10 mill
        
             
        
        
        
<span>defense and health care programs
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Health care programs are known to cost the federal budget over fifty percent of the total, with defense following closely. The federal government has invested heavily in healthcare welfare related projects.
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well there are multiple things they can pollute the air or take down trees for buildings. They hunt all the animals for food, They can take up entire lakes for water. There are multiple things that humans do to nature but is there like a set of answers you choose from or is it just a paragraph writing.