Siri strokes the cheek of her newborn daughter and the baby turns her head in the direction of Siri's touch and opens her mouth. This is an example of the reflex.

Rooting

Explanation:

Rooting reflex make infants instinctively open their mouth every time it touch another object.

Due to lack of brain and physical development, Infants unable to distinguish the the things that are edible and make personal effort to feed themselves.

All they can do is rely on the adults around them to obtain those foods. Because of this, Evolutionary psychologist believe that This reflex exist as as a form of  survival mechanism for the infants to obtain food.  

early settlements on the subcontinent. both the indus and the ganges rivers carried rich silt from the mountains to the plains. when the rivers flooded, the silt spread over the plains and made the soil in the river valleys fertile for farming.

answer; eurasia;