Answer:
It is important to first recall what ethos, pathos, and logos are. Ethos occurs when the advertisement/person relies on making themselves seem credible and trustworthy. Pathos requires emotion, which is usually controlled by the adjectives that are used in the argument. Lastly, logos use logic, which is usually characterized by facts and statistics.
#4: uses logos because it includes a statistic. This is known because it says "4 out of 5 people", which could be proven by research.
#5: uses pathos because it includes the phrase "family safe". People are more likely to buy a product that promises protection for the people they love the most.
#6: uses ethos because it includes the phrase "recommended by dentists". Dentists are trustworthy people, so people are more likely to buy a product if they know that it has been reviewed by people who are knowledgeable on the topic.
#7: uses pathos because of the phrase "value for money". Everyone likes to save their hard-earned money, so they are more likely to buy this product if they know they are getting more out of the amount that they spent.