As steel replaced iron, people also began looking for new fuels. which of the following fuels became popular in the late nineteenth century?

a.
wood

b.
petroleum

c.
coal

d.
nuclear energy

in contrast, the biological controls are self-sustaining, inexpensive and very effective once established. biological control could be used on thousands of golf course acres, improving their biodiversity and quality as wildlife habitat. in the process, the golf industry will be shown to be leaders in an environmental stewardship program of benefit not only to the lands they manage but also to the watersheds in which they exist.

answer; /// i do believe that its napolean's conquest of spain;