The country that people had used hieroglyphics was Egypt.
Nobody uses hieroglyphics in any country, except as decorations to create an "Egyptian" theme.
yes.
use it to write secret private messages.
Know one knows, but they were in widespread use by 4000 BCE.
They used hieorglyphs because thats how the ancient Egyptions communitcated without that they wouldn't know what people where writing. Like when they would write a story they would use hieorglyphs.
The ancient Egyptian civilization used hieroglyphics as their writing system, which consisted of various symbols and images to convey meaning. Today, archaeologists and scholars study hieroglyphics to better understand the culture and history of ancient Egypt.
Yes, they did.
The were used for written communications. The pictographs represented various sounds and words similar to the letters we use to write with.
It was a difficult system to learn, both to read and to write. Later alphabets became much easier to use.
The use of the owl in Egyptian hieroglyphs was very simple: it was used to write the consonant 'm'.
Recent discoveries of ancient writings found that the Kush did use hieroglyphics. Their style of hieroglyphics was very similar to that of the ancient Egyptians.