Answer:
1. A. The diminishing numbers of chimney swift can be reversed by simple conservation efforts.
2. D. The chimney swift's adaptability was severely hindered around 1970s.
3. D. It offers supporting evidence for the claim
4. A. The author provides facts to support the main idea
5. D. Metal-lined chimneys, chimney towers, and reforestation efforts will ultimately result in the growth of the chimney swift population
6. B. Chimney swifts can easily adapt roosting behaviors to any structure made of the proper material
Step-by-step explanation:
Chimney: Note that a chimney is an architectural structure that allows for ventilation in buildings by providing passage for smoke produced by a stove or fireplace in homes.
1. The idea that is mainly focus on in the passage is how the diminishing numbers of chimney swift can be reversed by simple conservation efforts.
2. Indeed, noteworthy from the passage is the fact that after the 1970s, the population of chimney swift's adaptability started declining.
3. Supporting evidence for the claim was provided by including this fact to show how the numbers of chimney swifts have declined by comparing the number of both times.
4. Since the main idea is about declining chimney of swifts and conservation efforts to restore their population, the author is expected to provide facts that supports the main idea.