The dam would add more support… instead of using dirt to hold up the rainfall running down from the mountain the dam would hold the water back and keep the water away from where it is headed
        
             
        
        
        
An example of this is to whether smoke cigarette or not. People smoke whenever they feel anxious with their activities but they were thinking that it is not a habit, but in the end, they will be used to it that is why they tend to forget how to live without smoking. This is the reason why they got addicted and to some serious problems with their health.
        
             
        
        
        
Answer:
 Helium 
Explanation:
 Helium is extracted in a few places in the world, namely USA, Algeria, Russia and Qatar. Helium is abundant in space, where it's produced as a product of the fusion reaction inside stars such as the sun.
 
        
             
        
        
        
Answer:
Water pollution may be defined as the contamination of the unwanted substance or pollutant with water that changes the normal characteristics of water. Three main contributors of ground water are as follows:
Chemical farming: The use of pesticides and fertilizers in the fields and its direct run off in river and groundwater causes the water pollution.
Industrial waste: The industrial waste consists of harmful chemicals and heavy metals. The direct discharge of chemical waste in the lakes, ground water and ponds makes the water dirty and causes water pollution.
Effluent from waste water treatment plant: The effluent and the harmful chemical waste release from the waste water treatment plant is the major contributor to the ground water. The effluents mix with the ground water and changes the ground water property. 
 
        
             
        
        
        
Answer:
genetic information is encoded as the sequence of nucleotides in DNA molecule