hey everyone please tell me that what's the meaning of the leftist party ,centrist party and rightist party​

Centrism is a political outlook or position that involves acceptance and/or support of a balance of social equality and a degree of social hierarchy, while opposing political changes which would result in a significant shift of society strongly to either the left or the right

The left–right political spectrum is a system of classifying political positions, ideologies and parties based on issues of social equality and social hierarchy. In addition to positions on the Left and on the Right, there are centrists or moderates who are not strongly aligned with either extreme. There are those who view the left-right political spectrum as overly simplistic, and who reject this method of classifying political stands, suggesting instead some other system, such as a two-dimensional rather than a one-dimensional description.

A.D. is alternating energy that switches back and forth
C.D. is current energy that keeps going