Answer:
a word or phrase preceded by a hash sign (#), used on social media websites and applications, especially Twitter, to identify messages on a specific topic.
Explanation:
Does it have to have a certain topic? Or can it be about anything?
The Apollo 13 was the 3rd mission to land the moon. The explosion of the oxygen tank effected this because the crew was forced to orbit the moon and land safely back to Earth without landing on the moon
You didn’t include the poem, so people cannot answer your question
