The correct answer for the drop-down menu for "each year, the record of are brought up showing the remains of past species" is B) Proxies of past climates.
Why proxies of past climates?
Past climate changes: While the sentence mentions changes in climate, it focuses on the method of studying them, not the changes themselves.
Geological formations: These can be proxies for past climates, but the sentence specifies something brought up yearly, not something formed over long periods.
Natural disasters: These can be influenced by climate, but the sentence emphasizes the study of climate, not the disasters themselves.
Therefore, "proxies of past climates" best fits the context of the sentence, referring to the objects or records used to understand past climate conditions.
Complete question:
Select the correct answer from each drop-down menu. Complete the sentences relating to proxies of past climates. Each year, the record of are brought up showing the remains of past species. A) Past climate changes. B) Proxies of past climates. C) Geological formations. D) Natural disasters