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.

[Q]: Question: The growth rate _____ as the population increases in exponential growth. 
 Answer: increases
[A]: In exponential growth as the population size increases, the growth rate also increases.


[Q]: Question: Dan falls from a single stair one day, then the next day falls down three stairs at once. After falling down one stair, compared to three, Dan will experience 
 Answer: less friction
[A]: Heavier objects press together with greater force, and this causes greater friction between them.


[Q]: Question: Jan had a very low heart rate, but was perfectly healthy, indicating that her heart expels blood in amounts that are 
 Answer: lesser
[A]:
When the heart expels more blood with each stroke, the heart has to beat less often in order to maintain the same volume of blood flow.