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: An increase in birth rates indicates a/an _____ in the food supply. 
 Answer: increase

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


Input: Consider Input: Question: When Derek was observing waves, he noted that some had more energy than others. The waves with less energy had particles that were 
 Answer: closer

Output: The more energy the wave has, the farther the particles of the medium move.


Input: Consider Input: Question: Don wants to make sure that his particles will move slower, so he will make sure the energy they have is 
 Answer: less


Output: The more energy the particles in matter have, the faster and more strongly they vibrate.