Deadweight loss in a market with negative externalities is to societal inefficiency as excess supply is to what?

Deadweight loss occurs when the market is not operating efficiently, often due to negative externalities like pollution. In this case, the costs of the externality are not reflected in the market price, leading to overproduction and wasted resources. Similarly, excess supply happens when there are more goods available than people want to buy at a certain price, which also creates inefficiency in the market. This situation can lead to unsold goods and wasted resources, similar to how deadweight loss reflects a loss of potential economic benefit. For example, if a factory produces too many toys that no one wants to buy, the resources used to make those toys are wasted, just like the resources wasted in a market with negative externalities.