Answer:
They most likely would have sent messages like if they won or lost a battle. The modern Athens Marathon commemorates the run of a messenger from a battlefield at the site of the town of Marathon, Greece, to Athens in 490 B.C. Legend has it that a messenger delivered the momentous message “Niki!” (“victory”), then collapsed and died. Maybe messages of where they should meet for battle, so if the figure out the enemy is attacking 50 miles west of where they were they could message their allies to meet there instead.
Explanation:
Harappan civilization forms an important landmark in the prehistory of the Indian subcontinent. The civilization offers an excellent example to the modern world in various ways. Their expertise in town planning, water management and harvesting systems as well as drainage mechanism is unparalleled.
The asnwer is A they were overcrowded and unclean
