Task: Question Answering
Input (English): 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 
 Option1: high 
 Option2: low 
 Explanation: At higher concentrations, particles of reactants are crowded closer together, so they are more likely to collide and react.
Output (English): low