Answer:
Option A
Explanation:
Options - 
A-avoid water pollution.
B-build thermal power plants.
C-add water features to gardens.
D-avoid drip irrigation systems
Solution - 
The largest source of freshwater on planet earth is underground water. The water beneath the surface of earth is very limited. The total fresh water reserve on earth is 3% of the total water on earth. Pollution due to discharge of waste water into the rivers and oceans has caused the degradation of not only surface water but also ground water.  
Thus, option A is correct
Drip irrigation is a means to prevent wastage of water during irrigation. Thus, avoiding it will cause further loss of fresh water.  
Addition of water feature will increase usage of water, thus it is also incorrect
Building thermal plant will also cause water pollution and wastage. Hence, option  B is also incorrect
 
        
             
        
        
        
Cambodia is among the most poorest country economically and socially
The disadvantages of development in places like Cambodia because
<span> People living in poverty often lose their homes for the sake of developmenten 
</span>because people loses their home and get even more poorer and loses their last wealth which is their homes
so i conclude correct option is B 
hope it helps
        
                    
             
        
        
        
Answer:
The answeer is both B and D.
 
        
             
        
        
        
Answer:
oxygen because 
Explanation:
because u  can survive 3 days with out it  and if u did not have oxygen u would suffocate
 
        
                    
             
        
        
        
Human sperm and eggs contain 23 chromosomes. Human zygotes contain 46<span> chromosomes. The type of cell division that produces gametes with half the normal chromosome number is called meiosis. It is used to produce cells for repair and asexual reproduction.</span>