In this clip, we see four-year-old Bradley performing a conservation task. Bradley has difficulty completing the tasks because he is at a preoperational stage of cognitive development.
The correct answer is the p<span>reoperational stage of cognitive development.
During ages 2-7, children typically fall under the p</span>reoperational stage of cognitive development. During this stage of development, children are able to adopt symbolic thinking, by using words and drawings to express things or ideas. However, during this stage of development, children lack the ability of conservation. This means that children do not understand that the quantity of something remains the same despite changes to its appearance, layout or orientation.
During the Mesolithic Era people settled in new lands.Improvements in tools during the Mesolithic Era include the use of bones.When the food and water became hard to find, many early societies split apart
