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: An decrease in birth rates indicates a/an _____ in the food supply. 
 Answer: decrease
[EX A]: Low food supply or a lack of space can lower birth rates, increase death rates, or lead to emigration.

[EX Q]: Question: A particle that is in the desert is likely _____ compared to one in the arctic. 
 Answer: faster
[EX A]: At higher temperatures, particles of reactants have more energy, so they move faster. They are more likely to bump into one another and to collide with greater force.

[EX Q]: Question: If Milo is hunting for water and he finds two water sources, which one will it be easier for him to extract water from? 
 Answer: one close to the surface
[EX A]:
The closer to the surface an aquifer is, the easier it is to get the water.