ANSWER:
I think it's the second one.
EXPLANATION:
in primary succession newly exposed or newly formed rock is colonized by living things for the first time. in secondary succession an area that was previously occupied by living things is disturbed, then recolonizeed following the disturbance.
 
        
             
        
        
        
Answer:
1 détresses in the troposphere inverses in stratosphere
 
        
             
        
        
        
I am pretty sure that a point mutation that creates a premature stop codon is called a synonymous  mutation. It also can be called silent mutation, if you have it in you option list, feel free to use it, it is the same. That will definitely help you.
        
             
        
        
        
A major result of the bank failures that followed the stock market crash in 1929 was that "<span>There wasn't enough money in circulation to support a healthy economy," since people had completely lost faith in the banking system.</span>
        
                    
             
        
        
        
I think the answer is A. Competition. :)