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: A rapid increase in electricity consumption could mean _____ pollution. 
 Answer: more

Answer: We need to reduce our electricity consumption in order to reduce pollution.


Question: Question: If Mary is taking a picture and she shuts the camera shutter narrower what will happen to the amount of light that gets in? 
 Answer: decrease

Answer: A camera shutter stays open longer in dim light to let more light in.


Question: Question: A very dense medium will cause light to move 
 Answer: slower

Answer:
The more dense the medium, the slower the light moves.