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).

[EX Q]: Paragraph: The higher up a food chain that humans eat, the greater the levels of toxic metals they take in.
 Question: If Jim eats animals that are lower on the food chain, the amount of toxic metals that enter his body are 
 Choices: A)greater 
B)smaller
[EX A]: smaller

[EX Q]: Paragraph: When a volume of water is cooled, the molecules move less vigorously, so same number of molecules takes up less space and the water is denser.
 Question: When we raise the temperature of water it becomes 
 Choices: A)less dense 
B)more dense
[EX A]: less dense

[EX Q]: Paragraph: The upper rock layers are much younger.
 Question: Sarah is looking at layers of rock on a cliff face. She can see that the rock at the very bottom of the cliff are 
 Choices: A)older 
B)younger
[EX A]:
older