Symbol i dikt

Hei. På skolen skal vi analysere et engelsk dikt og skrive en analyse på engelsk. Læreren gav oss en oppgave og noen dikt vi kunne velge mellom. Hovedoppgaven er å finne symboler i dikt. Jeg valgte diktet "The Road Not Taken", som jeg postet under her. Jeg vet ikke helt hva de mener med å finne symboler i dikt? Mener de fysiske symboler eller mer ting du kan lese ut av andre ord i teksten? Flott om noen kan gi meg en ide om hva symboler i dikt går ut på!

The Road Not Taken (by Robert Frost)

Two roads diverged in a yellow wood,
And sorry I could not travel both
And be one traveler, long I stood
And looked down one as far as I could
To where it bent in the undergrowth;
Then took the other, as just as fair,
And having perhaps the better claim,
Because it was grassy and wanted wear;
Though as for that the passing there
Had worn them really about the same,
And both that morning equally lay
In leaves no step had trodden black.
Oh, I kept the first for another day!
Yet knowing how way leads on to way,
I doubted if I should ever come back.
I shall be telling this with a sigh
Somewhere ages and ages hence:
Two roads diverged in a wood, and I-
I took the one less traveled by,
And that has made all the difference.