Rio grandma give me my 5 points
Hope this helps explain it :)
Answer:
The answer should be: Companies replaced hand-operated brakes with air brakes on trains.
Explanation:
You have to think how hard it was for trains to stop with hand operated brakes. Trains go fast, and not stopping in time can be dangerous. Hope this helped :)
Answer:
A. religious messages carved in oracle bones
Explanation:
I have read about the Shang dynasty in school, so how they developed writing is in my notebook. When fortune tellers became a thing, they wrote a fortune on a bone and threw the bones into a fire. The fortune teller would read the cracks on the bone. They used that writing for documents on paper.
