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).

Q: Paragraph: The gravitational force between two objects decreases as the objects move further apart.
 Question: Would an astronaut feel a lesser gravitational pull from the Earth when he is standing 
 Choices: A)on the floor of his house 
B)on the surface of Mars?

A: on the surface of Mars?
****
Q: Paragraph: When a person exercises regularly, and is fit, the heart undergoes certain long-term adaptations. The heart muscle gets stronger, and expels more blood with each contraction.
 Question: Compared to an obese person who has never exercised, would an Olympic sprinter in perfect condition be more likely to have a heart that can, with each beat, move 
 Choices: A)more blood 
B)less blood?

A: more blood
****
Q: Paragraph: Low food supply or a lack of space can lower birth rates, increase death rates, or lead to emigration.
 Question: Tasha is studying birth rates in various countries. She looks at two countries. In South Africa, the food supply is currently lower than in Australia. Because of this, the birth rate in South Africa, compared to Australia, will be 
 Choices: A)lower 
B)higher

A:
lower
****