instruction:
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: Warm air is less dense than cool air, so it rises higher in the troposphere.
 Question: If Jim raises the temperature of the air inside his balloon, will his balloon rise higher into the air or sink towards the ground? 
 Choices: A)rise higher 
B)sink lower
answer:
rise higher


question:
Paragraph: Fossils found at the lowest layer of rock would be the oldest, as these would have been buried for the longest time, whereas fossils found closer to the surface would be buried more recently and therefore be younger.
 Question: A fossil in the lowest layer of rock would be _____ than one higher up. 
 Choices: A)younger 
B)older
answer:
older


question:
Paragraph: Smoking reduces the amount of oxygen available for diffusion at the lungs, so less oxygen gets absorbed and blood is oxygenated to a lesser degree.
 Question: Less oxygen absorption means _____ oxygen in the blood. 
 Choices: A)more 
B)less
answer:

less