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: Fred found a longitudinal wave. The particles are getting further apart. The amplitude is 
 Answer: decreasing
[EX A]: The closer together the particles in a longitudinal wave are, the greater the amplitude.

[EX Q]: Question: Jeff noticed the food supply changed over time in his city. The advent of farming machines likely caused the food supply to 
 Answer: increase
[EX A]: Better farming techniques and machines increased the food supply and the distribution of food.

[EX Q]: Question: Kira is noting how valence electrons might be attracted by the nucleus. She sees that currently, the valence electrons are farther from the nucleus, which means they are attracted 
 Answer: less strongly
[EX A]:
When valence electrons are farther from the nucleus, they are attracted less strongly by the nucleus and more easily removed from the atom.