Question 1 of 8 Which of these fields of study would be the most useful for someone
interested in preserving native plants in grasslands?

Increased profits reduced health risks

Answer after wwii, communist countries in eastern europe formed the warsaw pack, a military alliance, and comecon, an economic alliance;

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. 

Ibelieve it is- a mixed economy offers some protection for consumer rights but still allows a good deal of choice.