Dharma in brief

Dharma which in English terms we call region.  Just religion does not completely define it. If we speak technically the social interaction between quaternary organisms which leads to the evolution of organisms is dharma. Dharma is not limited to humans and can be found in every organism. Animals and birds traveling in a group. The expression can be also found in single-cell organisms such as bacteria (conjugation).

The interactions can be direct or indirect. The direct methods are in which an organism directly interact to individual or group by means like help, appreciation apologies and other possible verbal actions. The indirect method comes to rules, ways to live such that it is socially beneficial to everyone. Every different religion preaches ways of living. The rules are such that would lead to the evolution of an organism for survival. Like birds always wake up early. Bats come out at nights only. The same way humans have. These rules also establish or destroy bonds in society. As ways of living indirectly affect the social strength of an organism therefore they indirect method bit necessary.
The basic form of dharma is in which an organism positively interacts with others and doesn't expect the same in return. In short selfless interaction (Heimdall character) such as helping, taking responsibility without any expectation.

You must be thinking why no expectation. If there is some expectation it should benefit the one which is helped. But most people help for their own benefit. Suppose if u expect, it becomes a slow poison incarnating within you (formation of Loki character). You incredibly help a person with the same expectation and finally, none of your expectations are fulfilled by that person. Your demon inside (built by expectation) you will rise with anger, you will speak such foul words to the same person whom u helped. You might injure them by your wrath. At the end of the day, you will be considered evil for the wrong expectations. You may think about how humans will survive without social expectations. But I am talking about organism level and not just human. Things are designed in such a way in nature and always be the same. In nature, both Heimdall and Loki will initially help the same way. It is untraceable that who is who until they are brought to point of frustration. The Loki character will show his demon side using abusive and even by acting unwisely. While Heimdall's character will not be frustrated and will ask for help. And if denied favors he would stop helping not because he expected something but his respect is hurt in front of everyone. Heimdall won't like to be called a fool. That character is so strong that he will never return to help even provided with huge favors  Bearing Loki inside will always bring imbalance in nature as your unfulfilled intention will give rise to a demon whose only will is to destroy. While Heimdall's character will always balance nature as they won't hurt the person whom they help and make the person realize that he should have helped you the way you did. The guilt will remain for eternity and would be felt at later stages of life unless Heimdall's character forgives him. The scientific base of dharma's energy is yet unexplored. What makes the urge of sharing in organisms is yet unknown? What kind of understanding between life initiated the process of conjugation (Sharing antibiotic resistance DNA and helping to survive) in bacteria possible is the same urge seen in any level of the organism. Philosophically it is more related to the science of weak forces. The weak force is not due to charge but masses that tend to exhibit attractive force like gravity. Thus the science of dharma is closely related to factors like mass, stability, and gravity that we are still unaware of.