The word to fill the
blank space is "Writing".<span>
Complete sentence is as below:
In early Mediterranean civilizations, the development of an extensive
trade network and a bureaucracy that could manage record keeping was based on
writing.</span>
<span>Record keeping is as important in contemporary times as it was in ancient
times, a skill which has helped human civilization cross many barriers. </span>
6 times -1/2 = -3 because half of 6 is 3
B. They needed natural resources from those places