Answer:
here are some ideas <3
Step-by-step explanation:
burning of paper.
cooking of food
burning of wood
rotting of fruits.
frying egg
rusting of iron
mixing acid and base.
burning of candle
leaves changing color
melting of sugar.
baking
explosion of fireworks.
souring milk
digestion of food
fermentation
lighting matchstick
photosynthesis
decomposition of waste