Question

which is the main persuasive appeal used in this ad?
the results are in.
in laboratory tests, the vilaplus vacuum picks up more dirt than the leading brand.
ethos (character) logos (reason)
pathos (emotion)

Explanation:

The ad uses laboratory test results (a form of evidence) to persuade. Logos is an appeal to reason/logic, which this ad does by presenting factual - like data (more dirt picked up than the leading brand). Ethos would be about credibility through character (e.g., a trusted expert endorsing). Pathos is about emotion (e.g., making the viewer feel a certain way like fear of a dirty home). Here, the focus is on presenting a logical reason (test results) to choose the vacuum.

Answer:

logos (reason)