The other is by burying or immersing a person in water. The Bible gives the answer. In the Bible baptism is called a burial. If we want to bury a dead body, we will not sprinkle a little dirt on the head. We will cover the body completely.
Baptism is a burial.
Sprinkling water on the head of a person does not baptize him. He must be completely buried under the water. Now John also was baptizing in Aenon near Salim, because there was much water there. John chose a place to baptize where there was much water . Sprinkling requires only a little water.