Final answer:
In an Activity-Based Costing system, costs related to a single activity measure are accumulated in a 'cost pool', allowing more precise allocation of costs to products or services.
Step-by-step explanation:
A "bucket" in which costs are accumulated that relate to a single activity measure in the Activity-Based Costing (ABC) system is known as a cost pool.
Unlike a basket of goods and services, which is a concept often used to measure price level changes over time, a cost pool is a grouping of individual costs, typically by function or department, to determine the cost drivers that affect the overall cost of production in an ABC system.
This allows businesses to allocate costs more precisely to products or services based on the actual resources consumed.