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.

[EX Q]: 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 
 Answer: low
[EX A]: At higher concentrations, particles of reactants are crowded closer together, so they are more likely to collide and react.

[EX Q]: Question: Twenty wolves recently left their pack for new territory. The smaller number of wolves in the pack means that the availability of food will be 
 Answer: greater
[EX A]: As the population increases, the food supply, or the supply of another necessary resource, may decrease.

[EX Q]: Question: Will's pupils grew larger as the night grew darker. This happens to let _____ light in. 
 Answer: more
[EX A]:
The pupil automatically gets bigger or smaller to let more or less light in as needed.