In this task, you are given a question and answer for that. The answer will fill in the blank or will complete the unfinished question. Your task is to provide an explanation based on the given question or fill-in-the-blank statement, and answer.

Example Input: Question: A 10 pound box would be easier or harder to shove than a 100 pound box? 
 Answer: easier
Example Output: Heavier objects also have more friction because they press together with greater force.

Example Input: Question: Dan needs to stay warm in the woods, and can bring one animal for body heat to sleep next to him. Given the choice between a horse and cat, Dan will choose the 
 Answer: horse
Example Output: Therefore, an object with more mass has greater thermal energy than an object with less mass, even if their individual atoms are moving at the same speed.

Example Input: Question: If Mona is filling a balloon with helium and she adds more gas to it, what happens to the likelihood that the helium particles will collide with each other? 
 Answer: more likely
Example Output:
At higher concentrations, particles of reactants are crowded closer together, so they are more likely to collide and react.