instruction:
In this task, you are given a question and answer for that. The answer will fill in the blank or will complete the unfinished question. Your task is to provide an explanation based on the given question or fill-in-the-blank statement, and answer.
question:
Question: Carbon dioxide levels increasing cause the temperature to 
 Answer: increase
answer:
An increase in greenhouse gases leads to greater greenhouse effect.


question:
Question: When we let a rubber band relax to a small size, it is easy to stretch meaning it has 
 Answer: less resistance
answer:
The farther you stretch the band, the greater the resistance is.


question:
Question: When two pieces of metal are rubbing together and sandpaper is added between them the friction 
 Answer: increases
answer:

To reduce friction, oil is added to the engine.