Based on the information present in the given passage, you need to write a correct answer to the given question. A correct answer is one that correctly and completely answers the question. Do not write answers that address the question partially or incorrectly. The correct answer must be contained in the given paragraph.

Q: Paragraph- Sent 1: An insect can have one of three types of change in its life.
Sent 2: A metamorphosis describes how insects change.
Sent 3: Some insects do not go through a change.
Sent 4: Instead, the young look like small versions of adults.
Sent 5: The only change between young and mature is size.
Sent 6: Other types of insects go through a change in physical appearance.
Sent 7: There are two types of this type of change.
Sent 8: Some insects change only slightly during their change.
Sent 9: This type is called incomplete metamorphosis.
Sent 10: Other types of insects go through a major change.
Sent 11: They don't look at all like the adult when they are born.
Sent 12: This type of change is called complete metamorphosis.
Sent 13: Occurs in the most primitive insects.
Sent 14: Newborn insect looks like a tiny version of the adult.
Sent 15: Incomplete Three stages: egg, nymph, and adult.
Sent 16: Young, called nymphs, usually similar to adult.
Sent 17: Growth occurs during the nymph stage.
Question: What do the young of insects who do not go through a change look like?.

A: Similar to the adult.
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Q: Paragraph- Sent 1: Fossils can be used to match up rock layers.
Sent 2: As organisms change over time, they look different.
Sent 3: Older fossils will look different than younger fossils.
Sent 4: Some organisms only survived for a short time before going extinct.
Sent 5: Knowing what organisms looked like at certain times also helps date rock layers.
Sent 6: Some fossils are better than others for this use.
Sent 7: The fossils that are very distinct at certain times of Earths history are called index fossils.
Sent 8: Index fossils are commonly used to match rock layers.
Sent 9: You can see how this works in Figure 2.30.
Sent 10: If two rock layers have the same index fossils, then they're probably about the same age.
Question: How can extinction help to date rock layers?.

A: Some animals only existed during certain time periods before becoming extinct. It helps to date that layer of rock where these animal fossils are present.
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Q: Paragraph- Sent 1: Mechanical energy is a combination of the energy of motion or position.
Sent 2: This type of energy describes objects that are moving or could move.
Sent 3: A moving ball can have energy from motion.
Sent 4: An arrow can also have the energy of motion.
Sent 5: Both are types of mechanical energy.
Sent 6: Can you think of some other examples?
Sent 7: Where does the energy of motion come from?
Sent 8: It comes from the energy created by position.
Sent 9: This energy is stored energy.
Sent 10: This means it is not moving yet, but it has the potential to move.
Sent 11: How can you store energy?
Sent 12: The arrow gains energy from the drawn bow.
Sent 13: As the arrow is released, the bow releases its stored energy and puts the arrow into motion.
Sent 14: Can you think of some other ways to store energy using position?.
Question: What does stored energy mean?.

A:
That object could move.
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