Summarize what is known about causes of heterosexuality and homosexuality.

The causes of heterosexuality and homosexuality are not fully understood and are likely to be a combination of genetic, hormonal, environmental, and social factors. Research suggests that both sexual orientations have a biological basis, with genetic and hormonal influences playing a role. However, environmental and social factors, such as upbringing, culture, and personal experiences, also contribute to the development of sexual orientation. It is important to note that sexual orientation is a complex and multifaceted aspect of human identity, and there is no single cause that can explain the diversity of sexual orientations observed in the population.