“we are muslim traders who travel through the mountains, grasslands, and deserts of central asia. it is an exhausting journey! desert storms are always near, and we often have little to eat. sometimes bandits attack us, so we form caravans to fight them off and protect our precious goods.” on what road are these people traveling, and what type of goods are they probably trading?

Central Asia stretches from the Caspian Sea in the west to China in the Eastern . Most trade routes through China were ones for the Silk Road. There, they traded mostly silk, iron, mirrors, weapons, ivory, paper, gunpowder, medicine, etc. So it's possible that the Muslims are traveling on the Silk Road, on their way to India. Why India? Because when entering India, you'll see sand, and later on grass. Persia, Egypt, and Arabia are all packed with sand. There's barely any grass. So in conclusion, The Muslims are traveling from China to India on the Silk Road, on their way to trade
silk, iron, mirrors, weapons, ivory, paper, gunpowder, medicine, and other items.

Probably japan. they got a really high life expectancy.