HIV crossed from chimps to humans in the 1920's in what is now the Democratic Republic of Congo. This was probably as a result of chimps carrying the Simian Immunodeficiency Virus (SIV), a virus closely related to HIV, being hunted and eaten by people living in the area.
Answer:
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Explanation:
Launching children means when your first child leaves home and ends with a "empty nest".................. Developing adult relationships with your children is a key of a stage.
The nervous system, Skeletal system, Muscular system and the Digestive system
