What were the Harappan most likely the first to do?

Question

Quizplus · Accepted Answer

The Harappan civilization was one of the earliest to cultivate cotton, which they used for clothing and traded with other civilizations. While they did have a system of symbols that may have been a form of writing, it has not been fully deciphered, and they did not leave behind extensive written records. Domestication of animals for farming and creation of a navy are not known to have been a significant part of their society, and while they did have trade networks, it is unclear if they were the first to introduce such networks into India.

What Were the Harappan Most Likely the First to Do