Answer:
Achieving emotional independence from parents
Children derive strength from internalizing their parents' values and attitudes. Adolescents, however, must redefine their sources of personal strength and move toward self-reliance. This change is smoother if adolescents and parents can agree on some level of independence that increases over time
Yes, a PFO can be fixed using a non surgical procedure causing it to be closed and therefore fixing it.
Can be prevented by getting vaccine and HBIG (hepatitis B immune globulin) soon after coming into contact with the virus. Persons who have recently been exposed to HBV should get HBIG and vaccine as soon as possible and preferably within 24 hours, but not more than 2 weeks after the exposure
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The answer is:
Age
This is because if your young your organs are not as developed. When your older your body handles more because it is developed fully.