Answer:
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Answer:When scientists focus on climate from before the past 100-150 years, they use records from physical, chemical and biological materials preserved within the geologic record. Organisms (such as diatoms, forams and coral) can serve as useful climate proxies. Other proxies include ice cores, tree rings, and sediment cores.
Explanation:
The long-term average of weather variations in a specific area.
On November 6 and 7, 1917 (or October 24 and 25 on the Julian calendar, which is why the event is often referred to as the October Revolution), leftist revolutionaries led by Bolshevik Party leader Vladimir Lenin launched a nearly bloodless coup d'état against the Duma's provisional government.