Someone who supports extreme changes in a society is a liberal.
radical.
Jacobin.
conservative.

Someone who supports extreme changes in a society is a radical.

Radical: Advocating or based on thorough or complete political or social change; representing or supporting an extreme or progressive section of a political party.

a

explanation:

the section of the chart that represents a point at which a bill needs approval from a majority of people in both chambers to advance is j, as this is the only section before the bill becomes law which has both rows (symbolizing the chambers) converging into one, meaning that the two parts of the congress have to approve of it before it can march on with the process.