Short answers, pulled from the story.
The word rhyme originates from a Germanic root meaning series or sequence and potentially links to the concept of enumeration. The spelling rhyme was introduced in the early Modern English period as a scholarly choice that likely confused the original etymology with the Latin word for rhythm.
The earliest surviving evidence of rhyming poetry dates back to the 10th century BCE in the Chinese Shi Jing. This ancient tradition suggests that the human ear has been attuned to the musicality of language for millennia before the concept became a structural element in European poetry.
In French poetry identical rhymes are acceptable and common while the language treats the silent e as an integral part of the rhyme. The French language creates a distinction between single and double rhymes that governed stanza formation in the 17th century and allows words like pont and vont to rhyme despite different spellings.
Some words in English such as orange and silver are commonly regarded as having no rhyme yet skilled writers have found ways to circumvent this limitation. Writers have rhymed orange with combinations like door hinge or lesser-known words like Blorenge a hill in Wales or the surname Gorringe.
In Tamil the rhyme called etukai occurs on the second consonant of each line creating a pattern distinct from the end-rhyming traditions of English or French. The Dravidian languages of India have rigid grammars for rhyme that can be expressed as a context-free grammar while the Urdu language uses the term Qafiya to describe rhymes essential to the structure of the Ghazal.
Rhyme serves as a powerful mnemonic device facilitating short-term memory and helping listeners to recall information more easily. The regular use of tail rhyme helps to mark off the ends of lines clarifying the metrical structure for the listener and creating a sense of closure.