Question

please answer this question its urgent​. please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please
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Answer 1

Hope it helps you.......☺️

Answer 2

Periodic changes are changes that occur periodically at regular intervals 

Examples - Day and Night, Beating of heart, Season changing etc.

Non-periodic changes are changes that do not occur periodically at regular intervals.

Examples - Forest Fire, Eruption of volcanoes, Earthquake etc.

I hope it would help you.