For what achievement has the athenian statesman cleisthenes been credited?

supporting the rights of slaves to vote
serving for four terms
designing the first democratic structures
constitutional reforms that opposed autocratic principles

The good asnwer is  "Designing the first democratic structures."

Explanation:

Cleisthenes (570-508 BCE) is an Greek statesman that is seen as the founder of ancient Athenian democracy. As the highest magistrate of the city-state, he found a common cause with the popular Assembly against the nobles and promoted democratic reforms. What is perhaps his most important contribution is laying individual political responsibility in citizenship of a place instead of clan membership.

If I had to choose between a humid tropical climate and a humid continental climate, I would definitely choose a humid tropical temperature due to the fact I prefer hot and humid summers, and mild winters. Furthermore, this kind of climate tends to be located at or near coastal locations, which is an aspect that I found crucial when deciding where to live. I need to be surrounded by beaches and sea, it is more appealing to me in order to enjoy life outside doing many activities according to these kind of weather, such as surfing. So that, If I had to pick a place with these characterisitics I would live in Sydney, in the New South Wales state of Australia.