Geologists have used two main types of evidence to learn about Earth's interior: direct evidence from rock samples and indirect evidence from seismic waves.
Answer:
Polar air masses derived from areas close to Iceland and tropical masses from the Azores bring, respectively, very different conditions of temperature
Explanation:
The length of time that a volcanic eruption impacts the climate is determined by the capacity of the volcano and how much material it will let out in the atmosphere. The smaller the volcano, with smaller capacity, the smaller effect it'll have on the climate and the duration of it's impact, and the space on which it'll have climatic impact. The bigger the volcano, with bigger capacity, the bigger the effect on the climate and the duration of it, and the bigger the space it will have climatic impact on.
Your answer would be "The native people of the region"
