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.
--------
Question: Question: Keith is showering, and is washing himself using a bar of soap, and then again with a loofah. Keith's skin will get better exfoliation, due to the greater friction, when he washes his body using the
Answer: loofah

Answer: Friction is greater when objects have rougher surfaces or are heavier so they press together with greater force.

Question: Question: Wendy is 30 years old while Jefferson is 60 years old. Who is more susceptible to disease?
Answer: Jefferson

Answer: Many diseases become more common as people grow older.

Question: Question: Micah is entering the atmosphere, and is approaching the Earth's surface. As he's passing through the troposphere, the air is going to get
Answer: warmer

Answer:
Air in the troposphere is warmer closer to Earths surface.