Answer:
Telegraphy, is the right answer.
Step-by-step explanation:
Telegraphy is the long-distance communication of textual information where the sender practices emblematic languages, known to the receiver, rather than a material transfer of an article carrying the information. Thus flag semaphore is a system of telegraphy. Though the ancient system of signalling was more extensive complex as in China, were usually not competent in transferring temporary text messages.
As per the question, Joe’s attempt to communicate using on a few essential words can be described as Telegraphy.