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

A: Many diseases become more common as people grow older.
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Q: Question: Carla is pushing two carts down a street. One cart is heavy, the other is light. The heavy cart, compared to the light one, will accelerate 
 Answer: slowly

A: The greater the mass of an object, the less it will accelerate when a given force is applied.
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Q: Question: Jeff should add _____ to his engine to reduce the friction in its processes. 
 Answer: oil

A:
To reduce friction, oil is added to the engine.
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