Select the most appropriate option to fill in blank number 4.
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. accelerate.
Accelerate means to speed up or increase the rate of something. In the context of global warming, the additional emissions would accelerate the global warming process, making it worse.
This fits the idea that the cycle of global warming is self-reinforcing and speeds up due to increased emissions.
The other options don't fit as well.