What are the themes of geography for Australia?

Cause of he different elevations  hope this ?

The problem of malnutrition in bangladesh is caused in part by "over population."hope my answer has you : )

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. 

Ithink i might know wait one second let me serve