The sentences that contain an example of ethos are number 1, 3 and 5.
As a rhetorical device, ethos is grounded in the speaker's credibility, honesty or authority to involve the audience.
In sentence number 1, the fact that Gizmotry and Gadgetry has been active for 140 years implies that it has a good service and has been able to adapt and evolve with the market, so it can offer a better service.
In sentence number 3, all customer orders are right, or they're free the example of ethos is present in the display of confidence and authority and work ethic to the point that assure the customer that in the rare case that the order is not right, he or she will not have to pay for it.
In sentence number 5, the fact that the person prescribing the medication is wearing a stethoscope implies that he or she is a doctor with the knowledge and authority to prescribe Barco's medication.
https://www.gradesaver.com/fahrenheit-451/q-and-a/5-faber-says-he-bears-some-responsibility-for-the-dismal-state-of-the-world-what-is-the-source-of-fabers-guilt-do-you-share-his-opinion-or-think-that-hes-being-too-hard-on-himself-367101
the answer
if you can't see it the answer is
I believe that Faber's guilt stems from his cowardice. It is very easy to see that he is not brave, such as when Montag has to convince him to go to his printer friend and when he gives Montag the earpiece so that he is with him without actually being there. While he is one of the few intellectuals left in their society, I don't believe that he had much in the way of responsibility because they were fighting a losing battle. Even if he had done more, it ultimately would have done nothing because the minds of the mass would not have been swayed by one more mere voice.
Thus, his guilt stems from his inability to act, but he is being too hard on himself as there is only so much that one person can do, especially facing the odds that he did.
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The answer would be D. to make larger
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