Question

how do scientists use ice to study ancient climates?
through glacial deposits and ice cores
through glacial deposits and ice ages
through ice cores and earths ellipse
through earths ellipse and ice ages

Explanation:

Glacial deposits and ice cores contain layers that preserve information about past climates such as temperature, precipitation, and atmospheric composition over long - time periods. Ice ages are long - term climate states and Earth's ellipse is related to orbital mechanics and not directly how ice is used to study ancient climates.

Answer:

A. through glacial deposits and ice cores