The best answer is:
Samuel Morse and the telegraph
Robert Fulton and the steamboat
<span>Cyrus McCormick (Inventor of the Mechanical Reaper) so its improved because he invented a better one than ones already invented
</span>hope this helped :)
Explanation:
therare no answer its key term
angulus casar
julis casar comander of solder
roman republic establish in roman empire
I believe it was a cow not sure though mb
