The correct answer is ice cores and rock records.
The geologists are the scientists that study the history of the climate and the patterns of the planet by mainly utilizing the rock records and ice cores. The rock records play an essential part as they comprise lots of substances, which can provide comparatively precise information about the climate in a certain period. The ice cores are also a good indicator for climate changes, and they offer answers with the help of distinct layers of ice, which get formed in the particular climatic conditions.
