The 'working memory' translates stimuli into symbols/information that can be stored in the brain for later retrieval... hope this helped! :)
<span>Since
there are no choices available I would assume that this is the answer. With the
settlement of people from fertile areas, knowledge of agriculture spread by
constant migration. During the early days, people thrived in their community
when there is fertile soil available for all forms of agriculture. But once the
land had been used up, people start to migrate to different locations where
they can possibly get their new food sources, thus knowledge of agriculture
spread into different areas. </span>
Answer:
You can research from trustful websites, like government websites, Wikipedia, or any websites.
Or you can watch videos and learn about water.