Cell, the smallest unit that can exist independently
        
             
        
        
        
The sun heats up water on the earth which causes the water to evaporate thefore the hot water vapor rises up to higher altitudes where it's colder which causes condensation, without the sun this could never happen
        
                    
             
        
        
        
<u>Answer:</u> 
To help relieve heartburn, a person should take medicine that is 'Over-the-counter (OTC) antacids and acid blockers'.
<u>EXPLANATION:</u>
- Heartburn is a very common symptom of a condition called Gastroesophageal reflux disease. 
- This affects the lower part of the esophageal sphincter and also the muscle ring-like connection between the 'esophagus and stomach' which tends to infuse a backward flow of the stomach secretions. 
- Along with some dietary and life style changes, the intake of antacids and acid blockers can help in the relieve of the symptoms of occasional heartburn.