They are all known as a skill related factor.
Chemical contaminants are chemicals toxic to plants and animals in waterways. The phrase 'chemical contamination' is used to indicate situations where chemicals are either present where they shouldn't be, or are at higher concentrations than they would naturally have occurred.
Answer:
-Hepatitis B and hepatitis C are liver infections caused by a virus. Because these infections can be spread in the same ways as HIV, people with HIV in the United States are often also affected by chronic viral hepatitis.
-Viral hepatitis progresses faster and causes more liver-related health problems among people with HIV than among those who do not have HIV. Liver disease, much of which is related to HBV or HCV, is a major cause of non-AIDS-related deaths among people with HIV.
Answer:
Receptors in muscles provide the brain with information about body position and movement. The brain controls the contraction of skeletal muscle. Nervous System: The nervous system regulates the speed at which food moves through the digestive tract.
Explanation:
Hope this helps!! :D