contestada

THE TIDE rises, the tide falls,
The twilight darkens, the curlew calls;
Along the sea-sands damp and brown
The traveller hastens toward the town,
And the tide rises, the tide falls.

Which statement best describes the theme of this stanza?
Nature and humans move independently of each other.
Human beings are challenged by events in the natural world.
Human beings have built too many towns near natural resources.
Nature will eventually solve all of humanity’s problems.