Owen is writing about the central ideas in "sonnet 18” by william shakespeare. but thy eternal summer shall not fade, nor lose possession of that fair thou ow'st, nor shall death brag thou wander'st in his shade, when in eternal lines to time thou grow'st, so long as men can breathe or eyes can see, so long lives this, and this gives life to thee. what is the central idea of these lines?
the author’s loved one will overcome physical death and summer is eternal.
attraction, love, and mild summer days are all fleeting and soon disappear.
beauty is not defined by the outward appearance, but by the character inside.
the author’s loved one will always remain beautiful in the lines of this poem.

The answer is- The author’s loved one will always remain beautiful in the lines of this poem.

Elaboration:

In this sonnet by Shakespeare, he asks to compare a young man to a summer's day. Doing so, he notices that qualities of the young man are greater when compared. He also depicts that a summer's day is a subject of change which eventually diminishes. The speaker ends his poem claiming the man will be eternalized through his melodious lines.

We can also extract the irony hidden in the sonnet. The poem does not suggest a faint detail about the young man who is told to surpass a summer's day in terms of attributes. However, the poem thoroughly portrays a day of summer.

The answer is- The author’s loved one will always remain beautiful in the lines of this poem.

Elaboration:

In this sonnet by Shakespeare, he asks to compare a young man to a summer's day. Doing so, he notices that qualities of the young man are greater when compared. He also depicts that a summer's day is a subject of change which eventually diminishes. The speaker ends his poem claiming the man will be eternalized through his melodious lines.

We can also extract the irony hidden in the sonnet. The poem does not suggest a faint detail about the young man who is told to surpass a summer's day in terms of attributes. However, the poem thoroughly portrays a day of summer.

i guess you are missing the idea that has to be supported, am i right?

i believe that is the truth if thats what you where asking for