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: You can find tables that show the pH value of different fruits and vegetables. The fruits such as oranges are very acidic so they have a pH value that is 
 Answer: lower
[EX A]: Acids have pH values below 7. The lower the pH value, the more strongly acidic the substance.

[EX Q]: Question: Willard dug up a rock from near the surface, and realized it was _____. 
 Answer: young
[EX A]: Therefore, deeper rock layers must be older than layers closer to the surface.

[EX Q]: Question: Bigger dogs have a faster growth rate than small dogs so that means they get: 
 Answer: Larger
[EX A]:
In exponential growth as the population size increases, the growth rate also increases.