Answer:
A. grandparents
Explanation:
A whole/part analogy is a relationship between two things where one is a complete entity (the "whole") and the other is a component or subset of that entity (the "part"), often used to illustrate similarities or connections between them.
In the whole/part analogy "building : museum" a building represents the whole entity, encompassing various structures constructed for specific purposes, whereas a museum is a subset of a building, representing a specific type of building.
A predecessor is something or someone that comes before another in time, position, or office. Grandparents are a specific type or subset of predecessors as they come before others in a family lineage, serving as the predecessors to their grandchildren.
Therefore, the word that completes the whole/part analogy is:
[tex]\Large\text{$\sf Predecessor : \boxed{\sf Grandparents}$}[/tex]
