Object Creation and Life Time?

What does this mean” Object Creation and Life Time”?

From the object creation and life time point of view, when an object is instantiated, all of its parts must also be instantiated at the same time before any useful work can be done and all of its part die with it. While in the case of association, the life time of two associated object is independent of one another. The only limitation is that an object must be alive or has to be instantiated before a message can be sent to it.