Answer:
Hi there! The answer is below.
Explanation:
Theories may be revised over time as new facts or technology become available. Changes in experimental procedures are a result of new developments, which offer data that may or may not support the existing theory. It's possible that the theory will be modified if it's still valid. The theory may be replaced if it is not supported but the results are true and important.
 
        
             
        
        
        
Answer:
number 17 is d 18 is c and 16 a
 
        
             
        
        
        
I believe the answer is d because if the majority of each is the same party they will likely hold similar views
        
             
        
        
        
Answer:
The signs reference the role of the government in protecting the natural rights of the people.
Explanation:
Taking into consideration the signs that the protesters carry, their demands seem to be regarding the safety and security of the rights of not only the people but also that of the whole planet, including the planets and animals. The reference to "Life, Liberty, and Property" in their protest also suggest their intention of demanding for the protection of the whole planet including Mother Earth.
And so, with these signs, the protesters utilizes the Declaration of Independence in emphasizing their demands of the natural rights of the people. The demand that the people have the right to have a livable planet and be safe is an undeniable right. that With the Declaration a part of their reference, they are alluding to the role of the government in ensuring the protection of the people's natural rights. 
Thus, the correct answer is the first option.