cause of action is a bundle of facts,the person aggrieved of his civil rights has to approach the court by way of a plaint.in the plaint he has to state the cause of action, that is what are the consequences which have forced him to file this civil action for infringement of his rights ,that is from which day his civil rights are being infringed,in which manner, has to be clearly explained to the court  in a sequence with the dates and clarity with the subject matter in dispute has to be explained to the court with clarity and further we have to plead that the suit is filed with in limitation period.

Basing on your cause of action the court will prima facie admit or dismiss your suit.the cause of action is a crucial and very important aspect while drafting a suit.

right of action is  a right to us when  infringement of your fundamental or civil,property,rights are affected you may avail the right of action  before the appropriate forum by any citizen who is aggrieved.

i think right to action is when your right is infringed by another you have the right of action aginest that person.

when you dicided to take action the tatal matter, reasons which was cause for infringement of your right is a cause of action. cause of action also deciedes the jurisdiction of court where u have to file case