A boy in a red shirt is squatting in front of a circle of stones with a pot in the middle.
A boy lights a grill in order to make some hamburgers.
There is no mention of the boy lighting the grill, only that a boy is in front of a circle of stones with a pot in the middle.
A circle of stones is not a grill.
A circle of stones cannot be regarded as a grill. If there is a pot in the middle, it is unlikely that the boy is making some hamburgers.