Merchants communicated with each other using various methods, including written correspondence, trade fairs, and word of mouth. They often relied on letters and documents carried by couriers to convey important information about goods, prices, and trade routes. In bustling marketplaces and trade fairs, face-to-face interactions allowed for negotiation and building relationships. Additionally, some merchants employed intermediaries or agents to facilitate communication across regions.
Insects communicate with each other by sensory.
I do not know how Jaguars communicate with each other. They might growl or purr.
They communicate with each other through Canalicili Extensions.
Penguins communicate by touhing each other, or feeling each other
they hit each other
They communicate with each other by sharing their ideas and maybe talk about their experiments together or writing to each other
Salamanders communicate with each other by visual ways. They also secrete a chemical that other salamanders can smell as a way to communicate.
by talking to each other
Non-sentient objects do not communicate.
Caribou communicate by snorting or grunting :>)
Octopus communicate with each other by the movement of their body and the change of body colors.
They communicate to each other by making their own sounds and they squeak at each other.