**The Slowest Means of Communication: PostCard**

There are various means of communication available to us in today's digital age. Each method has its own advantages and disadvantages, including the speed at which information can be transmitted. Among the options given, the slowest means of communication is the postcard. Let's explore why this is the case.

**Postcard Communication**

Postcards are a traditional form of communication that involves sending a written message on a small piece of card through the postal system. While postcards can be a nostalgic and personal way to communicate, they are not known for their speed. Here are some reasons why postcards are considered the slowest means of communication:

**1. Physical Delivery Time:**

When we send a postcard, it has to go through the physical process of being collected, sorted, and delivered. Depending on the distance and location, this can take several days or even weeks. In contrast, other forms of communication like telephone, fax, and email are almost instantaneous.

**2. Reliance on Postal Service:**

Postcards rely on the efficiency and reliability of the postal service. Delays can occur due to various factors such as weather conditions, public holidays, or high volumes of mail. In comparison, telephone calls can be made directly, fax messages are transmitted electronically, and emails are sent instantly over the internet.

**3. Limited Space and Speed:**

Postcards have limited space for writing messages, which can be a constraint when trying to convey detailed or lengthy information. Additionally, handwriting on postcards can be slower compared to typing on a computer or smartphone, further contributing to the overall slowness of this communication method.

**Conclusion**

In conclusion, the postcard is the slowest means of communication among the options provided. Its physical delivery time, reliance on the postal service, and limited space and speed for writing messages all contribute to its slower nature compared to other forms of communication such as telephone, fax, and email.