The answer is the sentence number 10. remember that ethos is characterized by the spirit of the culture. its manifestations and beliefs. sentence 10 fully described how long ACME works, and the culture or what it aims for 250 years, thus sentence 10 best describes ethos.
If i am reading this correctly, the answer is object predicate.
She understands me & loves me unconditionally no matter what I do.
Singular definition. In nouns, pronouns, and verbs, the grammatical form that refers to only one thing. In the following sentence, the singular words are italicized: “The police officer stops anyone who crosses before the light changes.” (from google)