Because it helps the environment strive and keep its self alive my controlling populations and bringing in new ones
        
             
        
        
        
male tesosterone can affect facial hair, voice deepness, testicle size, muscle mass, agressiveness, etc
 
        
             
        
        
        
Answer:
Some invent in order to meet basic human needs
 
        
             
        
        
        
18 g
Explanation:
Remember that 1g is equivalent to 1 ml;
1g = 1 mL
100 g = 100 mL
Therefore in an 18% NaOH solution,  for every 100 mL, there is 18 g of dissolved NaOH. This is how we derive the percentage solution;
18 g / 100 g = 18%