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 larger the animal, the heavier the exoskeleton, making movement more difficult.
 Question: Harry has a pet walrus. Jim has a pet parrot. Whose pet has a lighter exoskeleton? 
 Choices: A)Jim 
B)Harry
Jim