What are hailstones compared with in the metaphor exercise?

Which relative pronoun begins the clause in 'Lencho - who knew his fields intimately - looked at the... English · Unit 1 – A Letter to God Why is the clause about Lencho called non-defining? English · Unit 1 – A Letter to God What punctuation usually surrounds a non-defining relative clause in the middle? English · Unit 1 – A Letter to God Which word is a common relative pronoun listed in the chapter? English · Unit 1 – A Letter to God