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).
--------
Question: Paragraph: The more rope segments on a pully that are helping to do the lifting work, the less force that is needed for the job.
Question: Bob increased the rope segments on his pully; this means he will need to use _____ force on it.
Choices: A)more
B)less

Answer: less

Question: Paragraph: More recently, the death rate has fallen because of the availability of more food and medical advances.
Question: When the villagers are living longer, the food source is likely
Choices: A)great
B)small

Answer: great

Question: Paragraph: Warm air is less dense than cool air, so it rises higher in the troposphere.
Question: If air warms, it becomes _____ dense.
Choices: A)less
B)more

Answer:
less