Chemical- contains nutrients and vitamins that the body needs to survive and sustain . For example water is made up of hydrogen and oxygen, in which life wouldn't be without oxygen 
physical- water is naturally clear and pure free from artificial processing and colors which positively caters to the healthy look of a person
Please vote my answer branliest! Thanks. 
        
             
        
        
        
Oc would be the answer to this question
        
             
        
        
        
Considering the following statements; 
A. The trait is the same for all organisms
B. The trait is resistant to mutations
C. Most forms of the trait have the same impact on survival
D. The trait is passed on genetically to the next generation 
The correct answer is D. 
Genetic variation is essential for natural selection since natural selection can only increase or decrease frequency of alleles that already exist in the population. Genetic variation is caused by mutation and random mating organisms.