Answer:
the 3rd one
Explanation:
Because diffraction grating has light beams going in every direction and makes a rainbow.
Option A which is to help judge how children are treated under different political systems is the answer to the question: According to the text, which reason is not stated for studying child development?
<h3>What is child development?
</h3>
The term child development refers to the period the child grows from dependence from from parents or guardians to being an adult and independence. Child development involves learning language, growing physically, learning cultures and other things that helps one to be independent.
The period of child development is a vital period of transformation from child to adulthood and proper attention is generally required as this will help the child reach a height at which the parent or guardian wants.
As regards the question, According to the text, which reason is not stated for studying child development option A is the correct answer. and option A is to help judge how children are treated under different political systems.
Read more on child development here: brainly.com/question/18644919
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complete question
According to the text, which of the following is NOT a stated reason for studying child development?
A. to help judge how children are treated under different political systems
B. to better understand human nature
C. to provide help in the raising of children
D. to gain insight into social-policy issues that affect children
