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: The global climate warmed.
Explanation: Mount Pinatubo erupted in 1991 and is one in every of the biggest volcanic eruption that has taken area on earth. This eruption brought about the emission of a massive quantity of poisonous gases which includes sulfur dioxide and volcanic ashes. These had been trapped withinside the surroundings for a protracted length of time. There had been a few substances that meditated the incoming sun radiations again into space. Due to this, the gases had been trapped withinside the surroundings and sooner or later brought about a growing floor temperature. This occasion brought about the earth's international weather plenty warmer.
Because you can see all the mountains that are on the world and just understand it better<span />
