Morality makes reference to right and wrong behavior with regard to certain basic values. Right and wrong are defined by reason in relation to specific values. Moral theories differ in regards to the values in question, and the weight specific values are given in relation to each other, but generally the theories are concerned to alleviate suffering or promote well-being. Morality is often described as appealing to conscience and reason. For Law, right and wrong are defined by a legislative body.
Law threatens punishment from civil or institutional bodies.
For Religion, right and wrong are defined by authoritative scripture or revelation. Eternal reward or punishment is often perceived as being involved. For Custom, the notions of appropriate and inappropriate are central. Tradition provides the basis for determining what's appropriate. Punishment comes in the form of social approval or social condemnation.