In Buddhism, it is believed that we are raised by our father and mother. It is very appropriate for us to repay you by raising your parents in old age. That is gratitude.

Ven. Itshivat C

We are naturally predisposed to passing on our genes to our biological children and raising them well enough that they might take care of us in our old age.

In humans and other living things, reproduction is a natural process that involves transmitting genetic information to progeny. This is a fundamental biological principle that guarantees the survival of the species. However, it's crucial to recognize that the idea of raising children until they reach adulthood and expecting reciprocal care in old age is not just determined by genetics but also by a number of cultural, societal, and personal variables.

In many cultures, it is expected that parents will raise their kids and take care of their needs until they are adults. This may entail attending to their educational, emotional, and physical needs. It is hoped that youngsters will mature into independent adults who make valuable contributions to society. While there is a degree of reciprocity when it comes to taking care of aging parents, it is not always a given or an accepted practice across all cultures.

Varied civilizations have very varied ideas about what intergenerational care and assistance is, and these ideas can be impacted by things like cultural values, economic conditions, social institutions, and personal preferences. While institutional support systems and individual independence may be more important in some cultures, others place a greater focus on the extended family and shared duty for caring for elderly people.

It's crucial to understand that family dynamics and caregiving are complicated and influenced by a range of variables, such as personal circumstances, proximity to another person, and individual preferences. Not everyone has children, and not everyone gets help from their own children when they are older. The wellbeing of older persons can also be ensured by various types of support, such as care given by other family members, friends, or official systems.

While biology provides the basis for reproduction, a wide range of factors outside of biology influence how people raise their children and get care as they age. Intergenerational relationships and caring dynamics are significantly shaped by societal norms, cultural traditions, economic factors, and individual decisions.

Sure, we reap what we sow. Filial piety is basic ethics.