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B
Periodic change
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C
Undesirable change
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D
Fast change
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Solution
The correct option is A
Irreversible change
Explanation of correct option:
A. Irreversible change
Any changes which cannot be reversed or are permanent conversions are known as irreversible changes.
The germination of a seed is an irreversible change because once the seed is germinated, it cannot be reversed to seed again, that's why it is an irreversible change.
Explanation of incorrect options:
B. Periodic change
Periodic changes are the changes that repeat themselves after a regular interval of time.
Germination of a seed is not a periodic change because once it is germinated, it cannot be reversed back to a seed.
For example, the occurrence of the full moon is a periodic change.
C. Undesirable change
Germination of a seed is not an undesirable change because these changes are beneficial to nature and do not cause any harm to nature.
D. Fast change
Germination of seed is a slow change because it takes a few days to months to germinate into a Seedling from a seed. So, it is not a fast change.