It because they give us oxygen and without oxygen we would all die from oxygen deprivation.
the process that gives us oxygen is photosynthesis 
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Answer:
i believe the answer is C: hospitalizations
 
        
                    
             
        
        
        
It is considered that the child's IQ will be 50% more than parents IQ.
<h3>let's take an example</h3>
If parent's IQ is 100
50% of 100 is 50
Now add these values
100+50=150
So, The child's IQ will be always higher than parents.