What links the two clauses about people and mountains?

Supplementary Practice 26 — Comparative Rhetoric of Sūrat al-Qāriʿah and Sūrat al-Tīn

• Two related transformations in a single eschatological scene are coordinated
• The second necessarily cancels the first clause
• Every wāw here is an oath particle
• The second clause is a relative pronoun modifying the first