Final answer:
Diagramming a family tree demonstrates the ability to create a phylogenetic tree.
Step-by-step explanation:
The ability to diagram a family tree indicates that the child is capable of understanding and representing relationships between individuals in a family. In the context of biology, this skill is related to creating a phylogenetic tree, which represents the evolutionary history and relatedness of different species.
Just like a family tree shows how individuals are connected through generations, a phylogenetic tree shows the relationships between different species based on their shared characteristics and evolutionary history.
Therefore, if a child can diagram a family tree, it demonstrates their understanding of relationships and their ability to create a phylogenetic tree to represent the relatedness of different species.