What is the “arid zone” in australia and how are plants and animals adapted for survival there?

Can you submit a picture?

The name may be in importnce  to them

Economy is the answer

They contributed many things, but here are some examples:

1) democracy - democracy as a political system was first implemented in ancient athens
2) some advances in mathematics - such as the pythagoras' law
3) the script - the roman script was adopted from ancient greek.