Answer:
See below
Explanation:
There are several reasons that genetic variation occurs. Some of them are as follows: mutation, random fertilization, recombination event during meiosis etc. The way in which this variation in genetics is distributed is in a continuous way. In case of the human species, it is reported that 85% of all variation is within a certain population, while the remaining 15% of genetic variation is between populations.
 
        
             
        
        
        
I think it’s c but I’m not entirely sure
        
             
        
        
        
The salt most likely will raise the boiling and freezing points of the solution slightly.
 
        
                    
             
        
        
        
- decreases as altitude increases
- results from a column of air pushing on an area
- decreases due to fewer air particles pushing down
Pressure is the force exerted, by a substance, per unit area.
Explanation:
Pressure is given by the formulae;
P = F/ A
Whereby;
P = pressure
F = Force
A = area
Remember that ..
F = Ma
Whereby;
F = Force
M = mass
a = acceleration
Therefore pressure can be given as;
P = Ma / A
The mass of the above column of a substance multiplied by the acceleration due to gravity = pressure exerted by the substance. 
Learn More:
For more on pressure check out;
brainly.com/question/13363709
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