Here is your Short paragraph on Chrewal festival:
This is celebrated in Himachal Pradesh and is observed to destroy the insects which attack the crops and fruits during rainy season.
This is a festival of fire that starts on the first of Bhadon and lasts for one month.
On the first day, the people dig out a small circular piece of earth from the fields and put it on a slab or piece of wood. On this circular piece of earth, another slab is placed around which turf grass and flowers are tied.
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The whole of it is called Chiva, which is kept on the outer edge of a verandah. In the evening, the elders worship, Chira by burning incense and fruits are offered. Special foods are prepared on this day. Some call it ‘Prithvi puja’.