Answer:
ꜱᴏɴɴᴇᴛ 18:ᴄᴇɴᴛʀᴀʟ ɪᴅᴇᴀ
Step-by-step explanation:
Nature is beautiful, but it is subject to change. On the other hand, the beauty of the poet's beloved is unchanging. However, that beauty is liable to disappear with the death of his beloved. That is why the poet composes a poem whose subject is that very beauty in order to immortalize it.:)