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: At higher concentrations, particles of reactants are crowded closer together, so they are more likely to collide and react.
Question: Mike is watching how particles of reactants function, and sees that they are very far apart. Considering that the concentration of them is very low, the chance of them colliding together is
Choices: A)high
B)low

A: low
****
Q: Paragraph: The pupil automatically gets bigger or smaller to let more or less light in as needed.
Question: Jim looked at his cat's eyes on a bright sunny day, then he looked at the eyes when the cat was in very low light inside the house. In the high light condition, the cat's pupils well be
Choices: A)smaller.
B)larger

A: smaller.
****
Q: Paragraph: As greenhouse gases increase, changes will be more extreme.
Question: If greenhouse gases were greatly decreased, we can expect a _____ chance of extreme changes.
Choices: A)higher
B)lower

A:
lower
****