TASK DEFINITION: You are given a question or fill-in-the-blank question, two answer options (Option1 and Option2) and an Explanation. Your task is to find the correct answer (return the string of the correct option, not option1/2) for the given question from the given options and using explanation.
PROBLEM: Question: If Mona is building a circuit and she adds more resistors in series, what happens to the total resistance of the circuit? 
 Option1: increases 
 Option2: decreases 
 Explanation: As more resistors are added in series, the total resistance of the circuit increases.

SOLUTION: increases

PROBLEM: Question: If Milo calms down and his heart starts pumping less blood with each stroke, what happens to his heart rate? 
 Option1: increases 
 Option2: decreases 
 Explanation: When the heart expels more blood with each stroke, the heart has to beat less often in order to maintain the same volume of blood flow.

SOLUTION: increases

PROBLEM: Question: The increasing distances between galaxies indicates the Universe is 
 Option1: expanding 
 Option2: contracting 
 Explanation: As the Universe expands, galaxies move further and further apart.

SOLUTION:
expanding