Final answer:
Emma should include that her manager trusts her to put away money, signaling responsibility and trust. Examples and quantifiable achievements, using action verbs, will strengthen her résumé. Tailoring it to the company's needs is also important.
Step-by-step explanation:
The most valuable piece of information Emma should include on her résumé from the options given would be "My manager trusts me to put away money at the end of the day." This statement highlights her responsibility and the trust her manager has in her, which can be very appealing to potential employers. It is concrete evidence of her capability to handle important tasks and is directly related to her experience as a cashier. While being nice to customers and keeping a tidy workspace are also positive traits, the fact that her manager trusts her with money carries more weight professionally and indicates a level of maturity and reliability that is highly sought after in employees.
Mentioning that a manager gives long breaks as a favor is not professional and does not reflect well on an applicant's work ethic. In addition, Emma should focus on providing examples that demonstrate her skills and include any relevant accomplishments from her previous job, using action verbs and quantifiable results. She should also research the company she is applying to, to tailor her résumé and highlight how her skills will benefit the specific role she is interested in.