Question

what is hormones
expand the terms AIDS , STD AND HIV

Answer 1

acquired immunodeficiency syndrome. human immunodeficiency virus

Answer 2

Hormones are regulatory substance produced in an organism and transported in tissue fluids such as blood or sap to stimulate specific cells or tissues.

HIV- This stands for Human Immunodeficiency Virus 
AIDS- This is not a disease but a set of symptoms caused by HIV. It develops as a result of an advanced HIV illness.
STD- Sexually Transmitted diseases.