You are presented with the question "What event has an effect on corrosion?" and the following answer choices: 
- global warming
 - heating liquids
 - Greenhouse gasses
 - flow of electrons
 - chemical reaction
 - rain or sun shine
 - Cooking
 - evaporation

Now knowing that global warming is when worldwide temperature increases and corrosion always increases with increasing temperature, choose the best answer.


 

 global warming        