Given the task definition and input, reply with output. 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).

Paragraph: The particles in matter are always moving. The more energy they have, the faster they move.
 Question: When a child has a lot of energy they will move around 
 Choices: A)slower 
B)faster
faster