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).

Let me give you an 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
The answer to this example can be: scarce
Here is why: Based on the information given in the paragraph, population growth will make water more scarce, so that is the correct answer.

OK. solve this:
Paragraph: The higher the temperature, the more energy the particles have and the faster they will move and diffuse.
 Question: By filling a kettle with water and placing it on a burner turned to high, will the motion of the water molecules in the kettle 
 Choices: A)increase in speed 
B)decrease in speed.
Answer:
increase in speed