What did people do to get what they needed thousands of years ago?

They traded and in order to trade, they used trade routes (the name sounds pretty obvious). The most famous one is the Silk Road which connected the East to the West and traded several important and valuable materials such as Silk.

"The main purpose of parkour is to keep moving forward by combining various movements, (such as the roll, cat leap, precision jump, kong vault, and speed vault)—in a fluid fashion" is the sentence that incorrect mid-sentence punctuation. The correct option among all the options is option "D".