Within two centuries, estimates brooklyn botanical garden
vice president steven clemants, colonizing trees will have
substantially replaced pioneer weeds. gutters buried under
tons of leaf litter provide new, fertile ground for native oaks
and maples from city parks. arriving black locust and
autumn olive shrubs fix nitrogen, allowing sunflowers,
bluestem, and white snakeroot to move in along with apple
trees, their seeds expelled by proliferating birds.
which statement best explains how the structure of the passage supports the
author's purpose?

The passage traces the chronology of the biological succession of plants to predict that the city will become an oasis fit for human habitation.

Explanation:

In this passage, the author discusses how the vegetation of a particular place will change in the future. He tells us that colonizing trees will be replaced by pioneer weeds. We also know that new native oaks and maples will grow in city parks, black locust, autumn olive shrubs, sunflowers, bluestem and white snakeroot will appear and that birds will contribute to the spread of apple trees. In the passage, the author traces the chronology of the succession of plants and in this way proves that the city will become an oasis.

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a,b,d are the three sentences that use a reflexive pronoun