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.

Input: Consider Input: Question: A population of squirrels in a local forest had less food available to them this spring than they did last spring. During which spring will more squirrels leave the area to live somewhere else? 
 Answer: this spring

Output: Low food supply or a lack of space can lower birth rates, increase death rates, or lead to emigration.


Input: Consider Input: Question: Dwayne Johnson is weaker than Kevin Hart because he exercises less and therefore his muscles have grown 
 Answer: smaller.

Output: Exercising muscles increases their size, and bigger muscles have greater strength.


Input: Consider Input: Question: If Jim has a container of hydrogen gas that is 50 liters in volume and he moves the gas to a container that is 40 liters in volume, what happens to the density of the gas? 
 Answer: increases


Output: In the larger container we will still have the same number of gas particles, but now they are filling a much larger space.