Answer:
Adding a lake near any town will most likely increase rainfall because of the added water, and water vapor levels will also increase. Because of the excess water in the environment, more water will be found in the surrounding atmosphere (the same reason precipitation will increase in the area.)
 
        
             
        
        
        
Answer:
The correct answer will be option-A 
Explanation:
The ecological population is the group of the organism belonging to the same species which live or is found in the particular area and can interbreed.
Since in the given question, the redwood trees live in the same geographical area (forest) which can interbreed shows the population. The other examples represent the community which consists of more than one species.  
Thus, option-A is the correct answer.
 
        
             
        
        
        
Answer:
Cell membrane
Explanation:
The cell membrane is a flexible and permeable skin surrounding a cell.