I would say the third answer
It is a. principle because the question is asking about the commutative\
If these are the choices:
A.The powder is an unnatural substance.
B.The powder has a texture like sugar.
C.The powder looks like freshly fallen snow.
<span>D.The powder is used in house construction.
</span>
<span>A.The powder is an unnatural substance. </span>best explains how the phrase “white granular powder” supports the author’s purpose of calling attention to the environment.
Because the powder is an unnatural substance, it's presence is a major cause of concern because its composition and effects is still unknown and it is seen everywhere.
