When you search Google:
http://www.google.com/search?q=apach...les+directives, first link:
http://httpd.apache.org/docs/2.3/mod...reference.html gives you all explanations you need.
On the right side of the list there is "C" for each "core" directive, and when you click on directives, page that opens has a module name for each directive in the top square.
I suggest you improve on your google-ing skills, almost all of your questions so far are easily found in the search engines. That is the sole reason why only few people want to even answer you. We are here to help you solve your problems by pointing you in the right direction, not finding links for people not willing to search or think.
I hope you will not get offended by this, but if people see you are trying by your self, and get stuck somewhere, they will rush to your aid.