In this task, you are given a question and an answer, you would be asked to create the sentence based on the Question-Answer provided. It should be contained within the Question-Answer provided.

[Q]: Question: What goes through different larval stages? Answer: crustaceans
[A]: Crustaceans go through different larval stages.


[Q]: Question: What do muscles need to contract? Answer: stimulus
[A]: Muscles need stimulus to contract.


[Q]: Question: In harmonic motion there is always what force, which acts in the opposite direction of the velocity? Answer: restorative force
[A]:
In harmonic motion there is always restorative force force, which acts in the opposite direction of the velocity.