Inheritance - this is the ability to take on the properties of another piece of common code (a class) in order to reuse it for new functionality without having to rewrite it.
Ifa - leli yikhono lokuthatha izakhiwo zenye ingxenye yekhodi ejwayelekile (isigaba) ukuze uyisebenzise kabusha ekusebenzeni okusha ngaphandle kokuyibhala kabusha.