(d) Melting of glaciers
Melting of glaciers is a physical change (change of state from solid to liquid); no new substance is formed, so no chemical reaction occurs.
The textbook's Chapter 1 introduction lists milk souring, iron rusting, and grape fermentation as examples where chemical reactions take place (identity of substance changes). Melting is purely a physical change — only the state changes, not the chemical composition. Examiners expect students to distinguish physical changes from chemical reactions.