Good evening! Can someone please answer this, ill give you brainliest and your earning 50 points. Would be very appreciated.CAN SOMEONE ACTUALLY PLEASE ANSWER THIS AND NOT GIVE A RANDOM ANSWER, IT RUINS PEOPLE'S DAY SERIOUSLY.

Answer:
1. evidence of volcanic activity
2. carbon dioxide levels
3. temperature
Explanation:
Layers of ice accumulate over seasons and years due to climate changes over time. Climate change causes snow accumulation, greenhouse gas concentrations, volcanic and solar activity.