Which form of punctuation is missing from this sentence?

If price and worth mean the same thing, why priceless and worthless are opposites?

What makes this part of the anecdote about elisa effective? when [elisa] finally walks home, after seven hours of standing at a cash register, her feet hurt. she's wiped out. it makes the reader trust the author as an authority on teenage issues. it uses emotional language to the reader experience elisa's daily challenges. it presents facts to support the long hours elisa is required to work.

If you’re looking for a place to visit, i recommend yosemite national park. visiting yosemite has been a high point of my life. can you imagine waking up, inhaling the pine-scented air, and watching the pink-tinted mountains reflect the sunrise? later, as you hike, you’ll encounter meadows strewn with rainbows of wildflowers and lakes in astonishing shades of blue. the tone of the passage is effective because it defines yosemite for the reader. the author entertain the reader. instructs the reader on how to enjoy yosemite. supports the author’s attempt to persuade.