Question

Can someone please answer this, ill give you brainliest Would be very appreciated.

Answer 1

Answer:

leaf margins

Explanation:

Scientists study ice cores and leaf margins to learn about the past climates.

Further explanation :

Leaf margins are an indicator of the temperature in which a tree lives or lived. Paleobotanists use the margins of fossil leaves to infer past temperatures.

Answer 2

Answer:

Snail shells

Explanation:

Yea surprising answer but like this is from the web -> "New research shows that snail shells retain their carbon and oxygen isotope signatures after being boiled and, through those proxies, likely still preserve an accurate record of past temperature, rainfall, and vegetation."    

Sorry if wrong and hope it helps!  :)