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 _____ pulse rate is a sign of less oxygen to cells. 
 Answer: increased
[EX A]: This causes the delivery of less oxygen to the cells, and this stimulates the heart rate via adrenalin, so that pulse rate increases in an effort to deliver enough oxygen to cells.

[EX Q]: Question: If we have a bag of feathers and a bag of bricks of the same volume, the heavier item will be the 
 Answer: bricks
[EX A]: If we have two materials with the same volume, the material with a higher mass will be more dense.

[EX Q]: Question: When two batteries are placed together, John can tell that the electrostatic force is 
 Answer: more
[EX A]:
The closer the charged objects are, the stronger the electrostatic force.