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

Question: An object with a rough surface will have _____ friction than an object with a smooth surface. 
 Answer: more
Friction is greater when objects have rougher surfaces or are heavier so they press together with greater force.

Question: Will decreased his house energy consumption. He has _____ his personal levels of pollution. 
 Answer: decreased

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