In Silent Spring, Rachel Carson is concerned about the environment, while in Save the Redwoods, John Muir is worried about only certain parts. Thus, option A is correct.
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Silent spring is a book that describes the harmful effect of pesticides on the ecology and the environment. It talks about the movement that is concerned with the environmental harm by the excessive use of pesticides.
In the book, Save the redwoods, Muir only described the harmful effects of pesticides and pollution on the sequoia trees that are affected largely and only describes certain parts rather than the whole environment.
Therefore, Carson described the harmful effects on the whole environment while Muir only described the impact on certain parts.
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