A composition $($composite aggregation$)$ may express that $...$

$...$ a composite class can inherit the methods of the composed classes

$...$ when a customer is deleted from a database, all his orders are deleted as well $($dependency$).$

$...$ the brain is part of the human but not the other way round $($asymmetry$).$

$...$ a building part can consist of other building parts but not of itself $($no cycles$).$