13. A type of democracy where people gather together at a
particular place to discuss how to
govern their community is called

Direct democracy.

Explanation:

In direct democracy, people come together to discuss on how to government their community. it is also about casting vote directly on issues that matter or not. So, people vote directly, come together, discuss on things and that matter.

answer; researchers typically cannot control people's sexual behaviors as would be necessary in an experiment;