Describe one factor that can make relative dating difficult

Assuming this is a question on a test just name a restaurant by your house and the state you live in, its not too difficult : )

You will lose your drivers license along with your license plate.

Humans have survived and thrived in mexico city by using technology to create greater access to land. when the spanish conquered the aztec capital, tenochtitlan, in the 16th century, they built mexico city by draining the lakes and filling in the lake water to create more arable land for agriculture. this technique of land reclamation has continued to be fundamental to human civilization in mexico city. 

Ascenario that doesnt  include any modern objects like electricity