Final answer:
The subject of this question is Business, and the answer explains the importance of clear and professional communication with customers.
Step-by-step explanation:
The subject of this question is Business. The question is asking about how to communicate with a customer. In business, it is important to have clear and professional communication with customers in order to meet their needs and build good relationships.
When communicating with a customer, it is best to never write on it, meaning to avoid writing on the document or item that the customer provides. Instead, it is recommended to ask the customer how they would like to communicate. This allows the customer to choose their preferred method of communication, such as email, phone, or in-person meetings.