Grow surplus food. this is how our ancient civilizations came to be
<span>Among the choices the one that best illustrates an achievement of classical Indian science is D, an astronomer demonstrates that earth moves in relation to the sun. Indian astronomy has a long history extending from pre-notable to current circumstances. A portion of the most punctual foundations of Indian cosmology can be dated to the time of Indus Valley Civilization or prior.</span>
Because it was the only good thing they accomplished the rest just wasn't good enough or failed