Your question is incomplete because you have not provided the options. These are as follows:
the powder is an unnatural substance.
the powder has a texture like sugar.
the powder looks like freshly fallen snow.
the powder is used in house construction.
Answer:
The powder is an unnatural substance.
Explanation:
In in the excerpt from "Silent Spring," the author Rachel Carson makes reference to the effect that chemical poisons has caused in the atmosphere. In fact, she depicts a spring scene in which fine white particles of poison can still be seen on plants and roofs, and mentions that it had fallen heavily some weeks before.
