Explanation: Postal services in India are an essential part of the country's communication infrastructure, providing various methods to send documents and small items across the country. Understanding the different types of postal services is crucial for choosing the right method to send items.
1. **E-mail (Option A)**: E-mail is a digital method of communication used for sending electronic messages and documents. It is not suitable for sending physical items like a sample piece of cloth. E-mails are primarily used for digital communication and cannot transport physical objects.
2. **Inland Letter (Option B)**: An inland letter is a type of postal service used for sending letters and documents within the country. It is a flat, unsealed envelope that is used for written communication. While it can be used for sending documents, it is not designed to send small physical items like a sample piece of cloth. Inland letters are limited to written content and are not suitable for enclosing items.
3. **Post Card (Option C)**: A post card is a card that can be sent through the mail. It is primarily used for sending messages and is not suitable for sending small physical items. Post cards are limited in size and are designed for written communication. They are not designed to enclose items, making them unsuitable for sending a sample piece of cloth.
4. **Postal Cover (Option D)**: A postal cover is a type of envelope used to send documents and small items. It is suitable for sending a small sample piece of cloth to a friend in another city. Postal covers provide a secure and reliable method for sending such items through the postal service. They are designed to protect and transport small items safely, making them the best option for Malathi to send her sample piece of cloth to her friend in Chennai.
In conclusion, the correct method for Malathi to send a small sample piece of cloth to her friend in Chennai is through a postal cover. This method ensures that the item is transported safely and securely, making it the most appropriate choice among the given options.