Adjective clause

Function : adjective clause makes modifier from noun.

Note :

 Conjunction that can uses for thing or person

E.g

1. A politician (who, whom, which, what) runs for presedency is barack obama

The best answer is who

2. A founder of indonesian (who, whom, which, what) many people know is soekarno

The best answer is whom

3, a cave (who, whom, which, what, that) many people visit is being analyzed

The best answer is which