Based on the given description above, the correct answer would be the last option. Based on the given information above when the climatologist finds volcanic ash at the bottom of the core, followed by increasing amounts of dissolved oxygen as she goes to the top of the core sample, this might be because a <span>volcano erupted, followed by a period of increased oxygen in the atmosphere. Hope this answer helps.</span>
Answer:
1, In 1815 the European powers namely the Britain, Russia, Prussia and Austria had defeated nepolean and met at vienna to draw up a settlement for Europe.they drew up the treaty of vienna for the objective of undoing most of the changes brought by Nepolean.
2, Giuseppe Mazzini was a Italian revolutionary who forged to unify Italy into a nation state.
Geologist may determine the density of earth materials by measuring the mass of the object and its volume.
<h3>What is density ?</h3>
The mass of a substance per unit of volume is its density. Density is most frequently represented by the symbol, however Latin letter D may also be used. The formula for density is mass divided by volume
Earth's density is around 5.513 g/cm3 if you average the density throughout the entire globe. However, if you compare the density of the Earth by its layers, you'll notice that it rises continuously from the crust to the core.
To learn more about density
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