Part 1;
Because there is only limited amounts of fresh water on the Earth the rest is salt water; which humans can not survive on as the salt dehydrates our bodies instead of hydrates.
1) The more we try to get the the fresh water the more we will likely make more pollution. 
2) The more we use the less there is.
3) Everything needs water.
Part 2; no idea I believe it is the ice caps, as it is fresh water in the ice caps and not a lot of humans up there to pollute the runoff.     
 
        
             
        
        
        
Answer:Figure: The two stages of photosynthesis: Photosynthesis takes place in two stages: light-dependent reactions and the Calvin cycle (light-independent reactions). Light-dependent reactions, which take place in the thylakoid membrane, use light energy to make ATP and NADPH
Explanation:
 
        
             
        
        
        
Answer:
Flowering plants grow plants and use seeds to reproduce, or make more plants like them. 
Explanation:
 
        
             
        
        
        
When plates divide or separate it creates a divergent boundary.
        
             
        
        
        
Answer:
Diazepam.
Explanation:
Taxonomy is the field of the biology that mainly concerns with the classification, nomenclature, identification an systematic of the organisms. Different categories are isoltype, holotype, haplotype and prototype.
Pototype may be defined as a type of model used in the  cognitive science for the graded categorization. In the prototype some species is considered more central than the other species. In the given question, the diazepam can be used as a prototype. 
Thus, the answer is diazepam.