These young woman are taking food to the family working in the fields. You can see that they learn to balance baskets on their heads at a young age.
It seemed like goods of all kinds were transported either by baskets on the heads of men and women, or by some kind of boxes or baskets on a motorcycle. And, yes, we did see some delivery trucks too, but people everywhere were carrying things on their heads.
More rice is drying on the tarp in the background.