D brushing teeth removes plaque and food particles
Migration is affected by various factors like age, sex, marital status, education, occupation, employment etc. People migrate to those places where they have better facilities of health services, educational services, transportation and communication and the life is easier.
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We need to see the photo, I can't answer it without a photo
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Their lungs grow less than children who do not breathe secondhand smoke, and they get more bronchitis and pneumonia. Wheezing and coughing are more common in children who breathe secondhand smoke. Secondhand smoke can trigger an asthma attack in a child.