Passage Summary: Critics say ads make us want things we don't need, but the author argues ads just convince us that a product will satisfy a want we already have.

Conclusion: The desires that consumers believe products will fulfill are not actually created by the advertising agencies themselves.

Reasoning: While agencies work to make people believe a product will satisfy a specific desire, people only buy things because they already have those desires; therefore, the agency is inducing a belief about satisfaction, not the desire itself.

Analysis: This is a 'Complete the Argument' task, which functions much like a 'Must Be True' question. The author is defending advertising agencies by drawing a sharp distinction between 'creating a desire' and 'creating a belief that a product satisfies a desire.' To logically finish this thought, we need to conclude that the desires themselves exist independently of the advertisements. Look for an answer that emphasizes that these desires are pre-existing or at least not the fault of the advertisers.