Why did the Indus valley trade with Babylon by sea instead of by land?

The Indus Valley civilization traded with Babylon by sea primarily due to geographical advantages, such as the proximity of trade routes along the Arabian Sea, which facilitated faster and more efficient transport of goods. The extensive and well-developed maritime trade networks allowed for the exchange of a variety of commodities, including textiles, spices, and precious metals. Additionally, land routes were often more challenging and could be hindered by natural obstacles or political instability, making maritime trade a more reliable option for long-distance commerce.