Answer:
Urbanization has environmental and economic advantages for humans, but also substantial disadvantages, including increased problems with physical and mental health/stress, a modified climate, water and energy management, and air pollution.
 
        
             
        
        
        
To help the frog to maintain homeostasis
        
             
        
        
        
You can infer that the birds once had a common ancestor but became separated. Mutations in copying their genes stacked and caused changes in the beaks so the birds could be more well off or better adapted in their new environment.
        
                    
             
        
        
        
Answer: Splitting the water 
Explanation:
Carbon dioxide has a regulating function in the splitting of water in photosynthesis.