Answer:
<em>1 It </em><em>arrests </em><em>the vanishing apparitions...</em>
<em>2 </em><em>Sends </em><em>them </em><em>forth </em><em>among mankind</em>
<em>3 bearing sweet </em><em>news</em><em> of kindred joy...</em><em>abide</em>
Explanation:
Making immortal something is saving, recording, protecting or sending something.
Here arrests is used to show the capture of a moment, thus being made immortal.
When you Sends them forth the poetry will arrive at a different place, in a different time, and thus being allowed to obtain immortalness.
The word news in relation to abide is the acceptance of the poetic message by somebody else, implying that another soul is infected with the poetry and could pass it to somebody else.