Part 1. Definition
In this task, you need to write an incorrect answer to the given question. Along with the question, you are also given the correct answer(s) and the associated paragraph. An incorrect answer should be closely related to the content of the paragraph and/or the question but will not truthfully answer the question. Your incorrect answers should be similar to the given correct answer such that it will pose a challenge for students to distinguish the two. A good incorrect answer should prevent those who skip the paragraph from answering the question. The incorrect answer should not be trivial, in the sense that they should not be easily eliminated without reading the paragraph.
Part 2. Example
Paragraph- Sent 1: It was hot that day.
Sent 2: The temperature on the wall of the backyard was showing something well over 100 F.
Sent 3: Meanwhile Tom, at home, was trying finish the remainder of carrots from last night, and packing for his trip to Chicago tomorrow.
Sent 4: As employees of the Art Museum, Tom and his older cousin often had to travel to Chicago. Question: What was the temperature outside, when Tom was eating carrots? Correct Answer: well over 100 F.
Answer: Not very hot.
Explanation: This is a good incorrect answer, as most of the the words of this answer appear in the the paragraph. They are also related to the content of the question (temperature), yet do not answer the question correctly. Consequently, one has to carefully read the paragraph understand that "not very hot" does not answer the question.
Part 3. Exercise
Paragraph- Sent 1: Newton was the first one to suggest that gravity is universal.
Sent 2: That means gravity affects all objects in the universe.
Sent 3: Thats why his law of gravity is called the law of universal gravitation.
Sent 4: Universal gravitation means that all objects are affected by gravity in the same way.
Sent 5: This is the reason the apple falling from the tree and the Moon being held in orbit is the same.
Sent 6: Universal gravitation also means that while Earth exerts a pull on you, you exert a pull on Earth.
Sent 7: In fact, there is gravity between you and every mass around you.
Sent 8: Even tiny molecules of gas are attracted to one another by the force of gravity.
Sent 9: Newtons law had a huge impact on how people thought about the universe.
Sent 10: It explains the motion of objects not only on Earth but in outer space as well. 
Question: According to the law of universal gravitation, how are the apple falling from the tree and the Moon being held in orbit the same?.
Answer:
All happens due to lack of gravity.