it's basically talking about the fox in the picture and the water
The detail that best supports Jackson's prediction that Odysseus and
Telemachus will take the suitors by surprise is 3. let no one hear. If
no one hears about their plan, then they will be surprised when they see
what these two guys have in store for them. They will keep this plan a
secret until it is the right time to execute it and reveal to everyone
what they have been planning all along. The other options don't really
make much sense.
For the main reason that "it promoted sacrifice for the common good." the speech was commonly read during the Cultural Revolution. This speech was the primary political propaganda of Mao Zedong as a slogan during the dark times of the Chinese cultural history.
I just took the test, the answer was "It develops an anxious tone by inserting imagery associated with damage and injury into the passage."
Hope I could help, good luck!