The persuasive technique used in the example given above is emotional appeal because it is trying to connect with the consumers emotions by asking about the cellphone that they are using. By doing that, they are trying to tell the consumer that their product can give a better service than the current product that they own.
The sentence that has an incorrect shift in pronoun antecedent agreement is A) No one had noticed the pickpocket stealing their wallet.
"perfect chances of verbs?" I haven't heard of that, ever, in my 73 years.
Is it possible that you meant "perfect tenses of verbs?"
One possible answer for consideration would be "auxiliary verb," such as "had," "have," and so on.
