In baillargeon's view, infants have a pre-adapted, innate bias called the principle of that explains their assumption that objects do not change their properties unless some external factor obviously intervenes.

In Baillargeon's view, infants have a pre-adapted, innate bias called the principle of persistence that explains their assumption that objects do not change their properties unless some external factor obviously intervenes. Renée Baillargeon once represented totally new view towards the term of persistence which says that objects persist, just as they are, in time and space.

To solve their problems, mesopotamians used irrigation, a way of supplying water to an area of land. to irrigate their land, they dug out large storafe basins to hold water supplies these ditches brought water to the feilds. to protect their feilds from flooding, farmers built up the banks of the tigris and euphrates.hope ths !