What is typically placed at the bottom of a bag to provide support for heavier items?

The base of a bag is designed specifically to provide support for heavier items, ensuring that the weight is distributed evenly and the bag maintains its shape. It acts as a foundation that helps to prevent the bag from collapsing under the weight of its contents, thereby enhancing the bag's structural integrity. This is particularly important in retail settings, where bags may be filled with a variety of items, including bulky or heavy products. A well-constructed base allows for secure transport and minimizes the risk of damage to items inside the bag.

The other options do not serve this specific structural purpose. For instance, crushables tend to refer to items that can be easily damaged or compressed, fillers are used to occupy space but do not provide structural support, and loose items might simply refer to items that can shift or become disorganized within the bag. Thus, the base clearly stands out as the component specifically designed to bear and support the weight of heavier items at the bottom of a bag.