Here is a website that will help you find the answer and understand the poem as well...
http://www.sparknotes.com/poetry/hopkins/section4.rhtml
If you do not wish to visit the site I believe the answer is A.
Because she is mourning her own mortality, because man is mortal.
Answer:
THREE MILLION TONS OF BOMBS
Explanation:
Paraphrasing is important because it shows you understand the source well enough to write it in your own words. It also gives you a powerful alternative to using direct quotes, which should be used infrequently
PERCH
1) a thing on which a bird alights or roosts, typically a branch or a horizontal rod or bar in a birdcage.
2) (of a bird) alight or rest on something.
3) an edible freshwater fish with a high spiny dorsal fin, dark vertical bars on the body, and orange lower fins.
4) a linear or square rod.
Those are all the definitions. Whichever one relates to what you're learning.