Read the lines from "A Psalm of Life." Lives of great men all remind us
We can make our lives sublime,
And, departing, leave behind us
Footprints on the sands of time.

The imagery in the lines suggests that
time moves slowly and surely.
great deeds are remembered in history.
time is like an unending, perpetual desert.
each day is equivalent to a grain of sand.

The imagery in the lines suggests that  great deeds are remembered in history.

Explanation:

Henry Wadsworth Longfellow's poem "A Psalm of Life" talks of life in general and how it is like a battlefield. The poet talks of the purpose of life and how one can live a life that is filled with sorrow and suffering along the way. Nevertheless, the poet also reveals an optimistic side of living and that one can leave a "footprint" by doing good deeds.

In the given lines from the poem, the speaker mentions how "lives of great men all remind us we can make our lives sublime". He then uses imagery to reveal the "footprints on the sands of time". This imagery suggests that history will always remember the great deeds of people, no matter how many years passed.

Thus, the correct answer is the second option.