Can someone me i'm stuck between 3 answers

Nsilent spring rachel carson makes up a fictional story about what life in the united states will be like if we don't save the environment, whereas in "save the redwoods" john muir?

Which of the following best combines and shortens what happens in paragraphs 1-3

In the following complex sentence, identify the main clause. because soil quality is poor in southern africa, farms only thrive in places that receive more than 20 inches of rain annually. a) because soil quality is poor in southern africa b)farms only thrive in places that receive more than 20 inches of rain annually?