This wall helped a little keep small invaders out because it provided a wall that was difficult to get over. But it wasn’t good enough to stop big invasions because a large amount of people would overwhelm the guards.
plate tectonics suggests that the ( b. asthenosphere) floats and moves on the ( b. lithosphere)
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Its use is not known with certainty and all that we think we know is based on archaeological evidence alone. Some of the seals may have been used as amulets or talismans, but they also had a practical function as a marker for identification. Since writing in ancient times is generally associated with elites trying to record and control transactions, it is also believed that the Indus Script was used as an administrative tool. There are also examples of this script being used on clay tags attached to bundles of goods that were traded between merchants; some of these clay tags have been found in the Mesopotamia region, well outside the Indus Valley, a testimony of how wide goods travelled in ancient times.
