The question is extremely vague. “Ancient” covers a large period of time that had varied technologies. “Communication” is also a very vague term. That being said, I will attempt to give an answer.
I am assuming that you are asking about human communication. One of the things that distinguishes humans from animals is speech. Probably the most ancient means of communication was speech. Hand gestures, body language, and facial expressions are also a means of communication. Dance and music were also very ancient means of communication.
Messengers with verbal messages, signal fires, totems, banners, cave art, etc. were ancient means of communication that predate history.
Proto alphabets and pictographs were used as early as 60,000 years ago. Such script was found on egg shells dating back that far and found in southwestern Africa.
Genuine writing began as early as 5,000 years BC with the Vinca script (although this is disputed). It is undisputed that cuneiform script was in use in what is now Iraq about 3,000 BC. This early writing was typically impressed on clay tablets and allowed to dry. Small tablets could be transported between distant locations. Some script was also present on pottery. Rudimentary codes were used for distant communication with signal fires. Drums could be heard at great distances and were also used to communicate. Once paper was invented, things really took off, literally. Messenger pigeons were used as early as 1150 in Baghdad and also later by Genghis Khan. This ancient means of aerial communication was still in wide use in World War I.
More common were couriers on horseback that would take written messages quickly between people at distances. In ancient Persia (Iran) they had messengers, called angros that would carry messages in stations that had a day's ride distance along the royal road. The riders were exclusively in the service of government. A message could be transported from Susa (south western Iran) to Sardis (western Turkey), a distance of 1,677 miles in just seven days. The same journey took ninety days on foot. This type of system was later used by the Romans. Messages were also transported by boats and ships.
Even ancient communication could be relatively fast.
It is correct to state that a driver approaching a vehicle with a slow vehicle moving sign should slow down and only pass when safe and legal to do so. Hence, the given statement is true.
<h3>What indicates that an automobile is driving slowly?</h3><h3 />
On the back of cars driving at less than 40 mph, a reflective orange triangle serving as the "slow-moving vehicle" symbol must be visible.
You should be aware of how to safely handle any hazards these vehicles may provide, such as their varying sizes and slower speeds.
Therefore, It is correct to state that a driver approaching a vehicle with a slow vehicle moving sign should slow down and only pass when safe and legal to do so. Hence, the given statement is true.
learn more about slow-moving vehicles:
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Answer:b. There is no way to filter out all illegal content but still allow access to constitutionally protected materials.
Explanation:
Sometimes trying to filter out negative content may require extensive filtering which may even prevent access to materials which are useful and actual protected because filtering may include exception of certain words for example which shouldn't appear when one searches the internet however those word may also be used in a protected information which doesn't carry explicit and harmful information so it end up being difficult to filter these words out.
Smith stated in his theory that the free market economy is Governed by "Invisible hand"
This stands in opposite argument of the free market economy which stated that the free market is governed by supply and demand
hope this helps
I believe the answer is: Sheet metal
Self tapping screws are made by creating a gap in the connector within the thread of a crew, which creates a flute and cutting edge just like what we see on tap. This makes self tapping screws able to tap their own hole in a sheet metal while normal screws can't.
