hi their this is question my teacher is asking, " Describe the key industrial developments in the 19 th century. In your opinion, which was the most

hi their this is question my teacher is asking,

"  Describe the key industrial developments in the 19th century. In your opinion, which was the most important development for the Industrial Revolution?"

i found it very hard finding these as well as deciding the most important development for the indurstrial revolution.

heres my porfessor power point, it gives brief summary if that helps

https://moodle.bergen.edu/pluginfile.php/1764021/mod_resource/content/0/Age%20of%20Industry%20Printout.pdf

thank you