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).
Q: Paragraph: If the gas is heated, the particles will move faster as they gain more energy.
 Question: Bob cools down some gas at the plant. When he does this, the gas particles move slower and 
 Choices: A)gain energy 
B)lose energy.
A:
lose energy.