Question

Give any 2 examples of changes that
are natural, slow and undesirable.​

Answer 1

Answer:

For example : ripening of fruits , germination of seeds , change in season etc. Non desirable or Undesirable changes are those changes which we do not want to take place. For example : rusting of iron, souring of milk, rottening of fruits and vegetables , global warming etc.

Answer 2

Undesirable Changes
Changes brought about by a person or by nature which is harmful are known as undesirable or non-agreeable changes.
Examples: Rain causing destruction by floods, the souring of milk, rusting of iron, rotting of fruits and vegetable, global warming, earthquakes, tsunami, etc.
Slow Changes
Changes which take a long duration of time or occur slowly are called slow changes.
Examples: Growth of nails, tooth decay, change of seasons, rusting of iron, the growth of a human, growth of a tree from a seed

Natural changes

Examples of natural changes are growth in man and seasonal changes and examples of man-made changes are burning of fuels and chemical reactions.
Hope it helps u