TASK DEFINITION: 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.
PROBLEM: Question: If Mona owns a car and she decides to switch to a cleaner burning fuel, will she create more or less pollution? 
 Answer: less pollution

SOLUTION: The advantage to biofuels is that they burn more cleanly than fossil fuels. As a result, they create less pollution and less carbon dioxide.

PROBLEM: Question: Twenty wolves recently left their pack for new territory. The smaller number of wolves in the pack means that the availability of food will be 
 Answer: greater

SOLUTION: As the population increases, the food supply, or the supply of another necessary resource, may decrease.

PROBLEM: Question: A hard rock will erode _____ than a soft rock. 
 Answer: slower

SOLUTION:
The water erodes the softer rock faster than the harder rock.