The navigable rivers in Western Europe have historically impacted economic development in the region by —

A. providing for the irrigation of arid land
B. blocking the spread of epidemic diseases
C. preventing the advancement of land armies
D. facilitating the movement of goods and people

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. 

Adrought is taking place

Light rain because storms had lightning and it started crops on fire or destroyed stuff