Part to Whole Analogy: Tree and Leaf

In the world of biology, each living organism is made up of various components that work together to form a cohesive whole. In the same way, the relationship between a 'tree' and its 'leaf' is a classic example of part to whole. The question is to find an analogous relationship that shares the same part to whole structure. Which of the following options represents a part to whole relationship analogous to that of a 'tree' and a 'leaf'?