The last one(...) i guess since the () don't make sense neither does the hyphen nor the /
Example of a sentence that most needs to be revised because it's description is too vague is : we hike two miles uphill in the blooming forest.
Usually, you hike on the mountain not in the blooming forest.
hoep this helps
The answer is. The work describes Thoreau's thoughts over the course of a year spent immersed in the natural world.