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.
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’.