Why may changes in the cropping calendar be necessary in the context of climate change?

Correct answer: Because rainfall and temperature patterns may change

A cropping calendar tells farmers when to prepare the field, sow seeds, irrigate, and harvest. These timings depend partly on rainfall, temperature, and the length of suitable growing conditions. Climate change can alter the arrival of monsoon rain, increase heat, or make dry periods less predictable. If farmers follow an old calendar without adjustment, seeds may be sown too early or too late, causing lower yields or crop failure.

Option A is correct because changing rainfall and temperature patterns may require new sowing and harvesting dates. The other choices do not explain climate-related adaptation. A market name, land document, or the fact that seeds remain similar does not determine the weather-based crop calendar. Changing timing is one possible way to reduce climate risk.