I'm not sure to which story you are referring, but here's what the symbols mean. A pendulum is the part of a clock (i.e. a grandfather clock) that counts the seconds as they pass. They would symbolize the unstoppable nature of time. An old man with a scythe might represent the grim reaper or another figure of death. Both of these symbols have to do with growing older and moving on (dying).
<span>The specific clues that
describe the end rhyme from suggested options are: rhyme that Poe used and line
end. First option is they clue that can define the end rhyme because it was the
“only one of the rhyming devices Poe has used” and the second one because it represents
the place of the rhyme (rhyme is at the end of the line).</span>