What invention improve transportation on the river increasing trade

Reason i shouldnt turn back if i'm lost in the wilderness need fast

According to the article about the zhou dynasty, this dynasty was broken into different eras because its capital changed from place to place. how many different eras were there in the zhou dynasty? a. two b. six c. ten d. fourteen

The san andreas fault which runs through california is two plate sliding sideways past one another which type of metamorphoism is most likely to occur along the fault line