The yield of rice in a coastal district falls sharply in one year because a sudden cyclone damages the crop. This change in the time series of yield is an example of
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → Irregular variation
Irregular variations are unpredictable changes caused by unforeseen events such as floods, cyclones and other natural calamities. They are short-term and do not repeat in any pattern.
A sudden cyclone that spoils the crop of one year is such an unforeseen event, so the fall in yield is an irregular variation.