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 type of light is composed of many rays having random polarization directions? Answer: unpolarized light
[A]: Unpolarized light type of light is composed of many rays having random polarization directions.


[Q]: Question: The ocean basin begins where the ocean meets what? Answer: land
[A]: The ocean basin begins where the ocean meets land.


[Q]: Question: What is the energy needed to start a reaction between catalysts and reactants called? Answer: activation energy
[A]:
Activation energy is the energy needed to start a reaction between catalysts and reactants called.