Pre-columbian civilization can be considered advance, because the Native Americans had a very civil and structured way of living before Columbus. They had different but effective technology to farm, and they had there own way of trade. Pre-Columbia was very adapted and organized, before english settlers took over.
don’t know if this is too late but hope this helps :)
I have been trying to google about the topic you are searching for. Are you sure that the stage you need to write about is called transitional? Probably you have meant revising stage. <span>No text should be sent out or published without going over it at least once! Twice is even better. You must reread even the shortest business email to prevent any embarrassing mistakes (such as sending the wrong email to the wrong person, to start with). Revising means evaluating your text’s content and making sure you actually wrote what you intended in the planning stage. </span>
<span>b. His new watch is self-winding, but it still needs a battery.
It contains a conjunction between the two clauses and has a comma too.
Hope this helps. </span>