You are given a short paragraph, a question and two choices to answer from. Choose the correct answer based on the paragraph and write the answer(not the key).
Example: Paragraph: Many of the worlds people live with water scarcity, and that percentage will increase as populations increase and climate changes.
 Question: John's town used to have lots of water, back when there were only a few hundred people. However, now that the town holds several thousand people, the water availability is 
 Choices: A)scarce 
B)plentiful
Example solution: scarce
Example explanation: Based on the information given in the paragraph, population growth will make water more scarce, so that is the correct answer.

Problem: Paragraph: When a volume of water is cooled, the molecules move less vigorously, so same number of molecules takes up less space and the water is denser.
 Question: If Mona fills up a cup with water and places that water into the oven, what happens to the density of the water as it heats up? 
 Choices: A)increases 
B)decreases
Solution: decreases