I hope this helps with your work you’re welcome
<span>a. Lister’s work was only made possible by Pasteur’s discoveries.
Pasteur first theorized the cause of infection to be germs. Lister built on the "germ theory" and created the ideas of sterile surgery.
Both Pasteur and Lister are credited for revolutionizing surgery to become a sterile process. Without Pasteur's "germ theory", Lister would not have had a theory to work from. The two scientists also corresponded with one another improving the process for sterilization. </span>
Germany and Austria-Hungary by the Dual alliance
The Great Famine of 1845 refers to the period when <span>the potato crop failed in successive years (between 1845 -1849)
Before the Great Famine, The Irish population experienced a healthy Growth each year, but after the great Famine the Irish population dropped to almost 2 million and they're dropped off to poorer neighborhoods.</span>
