title: Is this family class diagram an example of aggregation or composition?
body: <p>I'm looking for a some clarification I have with regards to the class diagram below: "Is it an aggregation or a composition? Explain why."</p>
  
  <p><img src="https://i.stack.imgur.com/ao5wt.png" alt="Class Diagram in question"></p>
  
  <p>I'm in two minds about this answer. From what I understand initially the student 'has a' family, mother and father; therefore this is an example of composition because the concept of a mother or father cease to exist without the student (son,daughter) existing. However, if I look at it another way, if the student (child) [ceases to exist]/[never existed at all], there is still the possibility that two individual objects (here named Father and Mother) exist and would still contain the same attributes; which would be an example of aggregation. </p>
  
  <p>Hopefully how I've tried to convey my line of thought makes sense. Can somebody please clear this up for me?</p>
  
  <p>Thank you for your time.</p>