How is HIV mainly transmitted?

The primary mode of transmission for HIV (Human Immunodeficiency Virus) is through the exchange of body fluids. This can occur during activities such as unprotected sexual intercourse, sharing needles, and from mother to child during childbirth or breastfeeding. HIV is present in blood, semen, vaginal fluids, rectal fluids, and breast milk, and typically requires these fluids to enter another person's bloodstream for transmission to take place.

Other options listed do not accurately represent how HIV is spread. For instance, infectious droplets in the air, food contamination, or transmission through the air are not methods by which HIV is transmitted. Understanding the specific ways in which HIV is spread is essential for effective prevention and education about the virus.