<span>A. He did capture his beloved's beauty in verse.</span>
I would say that the lines which show us how desperate the poet is are the following:
"... helpless in my throes, Biting my truant pen, beating myself for spite--"
As you can see here, the poet says he is helpless, meaning that he cannot find inspiration to write what he wants to write. Therefore he is desperate for some inspiration, which is why he is biting his truant pen in order to show how anxious he is to get his inspiration back.
<span>Its a layer of cells in the cortex of a root and some stems are surrounding the vascular bundle</span>
rhyme scheme is one of the elements of the sonnet form.