A deadly threat is the best fit description of menaces in this context.
Answer:
Homeostasis=the tendency to maintain a balanced environmental
condition in the body
Response= A reaction to the change in the environment
Stimulus= A change in the environment
Response Organism perspires after body temperature rises=Homeostasis occurs to lower body temprature
Response Organism increases their breathing rate=homeostasis occurs cells need more oxygen
Response Organism feels thirsty= Organism will drink water
It's not a denotation. If it were, the earth would be cinder long forgotten millions of years ago.
It really isn't to reveal the importance of watching the sky. The word burn is used poetically. If the poem wanted you to watch the skies, it would have said so either directly or indirectly using poetic language. Nowhere are you being asked to watch the skies.
There is nothing in theory about the burn and as a consequence there is nothing critical in the tone.
That only leaves A but it is not a very good answer.
A <<<< answer.
The business survival skills of the 1930s quickly gave way to a new form of leadership that tested the limit of America's ingenuity, productivity, and compassion.