Marketing is sometimes accused of encouraging excessive consumption while deflecting attention away from the ‘negative e

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Marketing is sometimes accused of encouraging excessive
consumption while deflecting attention away from the ‘negative
externalities’ of that consumption. These are costs suffered by a
third party, as the result of an economic transaction. From the
following examples of third parties, which is the ODD one out in
this context?
1. Labour forces involved in producing the product/service being
exchanged.
2. The seller/organization in the economic transaction, that
trades fairly and ethically.
3. A population’s public health service and costs.
4. The environment, nature, and biodiversity.