I believe the answer is A i hope this helps!!!!
Answer:
mandate of heavan
Explanation:
i remeber studying about 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 :)
<u>Answer:</u>
Leonardo's ability to observe and study, then demonstrate those things in his art, he was pretty much the definition of a Renaissance man. Defined: Renaissance man: a person with many talents or areas of knowledge.
