The poor standing of Leopold the 2nd is most probably attributed to the role he had in the extermination of huge amounts of people in Belgian colonies at the time. This wasn't known at the time, but today we known that Leopold the 2nd had ordered a genocide over the Congonese people.
Petroleum ( like Oil, diesel, gases), electrical power and Nuclear power replaced wood and steam, due to development in our technology.
Hope this helps!
The four parts of the Declaration of Independence:
<span>1) Preamble </span>
<span>2) Natural Rights </span>
<span>3) List of Grievances/Kings wrongs </span>
<span>4) Independence
So the best answer would be C. a plea for world understanding</span>