Answer:
D. Number of individuals in a specie
Step By Step Explanation:
        
                    
             
        
        
        
The assurance of an umbrella species advantage a biological community is by an extensive variety of different species are ensured and in addition their natural surroundings. Umbrella species will be species chosen for settling on preservation related choices, commonly in light of the fact that ensuring these species in a roundabout way secures the numerous different species that make up the environmental group of its natural surroundings.
        
             
        
        
        
It contains 72 percent hydrogen, 26 percent helium and other elements like oxygen, carbon, neon, nitrogen, magnesium, iron and silicon.
        
             
        
        
        
1. B 2. c. 3. B and im not sure about the other two
        
                    
             
        
        
        
Answer:
D. Refusing to take an antibiotic for a viral infection
Explanation: