England, Spain, France, possibly Holland, Prussia
Answer:
the spread of islam and fighting between people for power to rule
There were many reasons for not unifying in one
political system:<span>
One of them was the geography, Greece contained many mountainous
terrains, valleys which were separated from each other, many islands where it
was easy to form new towns and settlement, giving birth to many power centers
instead of one
Another reason was the sense of heroism in Greece and to
fulfil that the great Mediterranean, they could sail to wherever they wanted in
the times of need resulting from any kind of crisis and this helped them
establish new colonies all over the Mediterranean.
<span>Third reason was the presence of aristocracy who denied the
establishment of a monarch and each city or state defended their independence.</span></span>
<span><span> A.</span><span>Since ancient times, people have used waterways for transportation.
</span></span><span> B. When natural waterways are too difficult to navigate, people sometimes dig canals to provide a better means of transportation.
</span>
<span>D. Canals are man-made waterways that change the natural landscape to meet human needs.</span>
Thomas Jefferson was the main author of the declaration of independence
