Marianne nicholson’s cliffside pictograph represents which northwest native american tradition that had been suppressed through most of the twentieth century?

The potlatch.

Explanation:    

Marianne Nicholson is a visual artist, whose work examines the conservation of indigenous cultures.

She was first recognized when she displayed her work Cliff Painting in  Kingcome Inlet, British Columbia, Canada in 1998. The Painting refers to the history of the Dzawada'enuxw Tribe of the Kwakwaka'wakw. The Cliff pictograph was done in copper design which represents wealth in Kwakwaka'wakw Tribe.

A potlatch is an old ceremonial tradition of gift-giving celebration(feast) performed by Indigenous Tribes of the Pacific Northwest Coast of Canada.

╭━┳━╭━╭━╮╮

┃┈┈┈┣▅╋▅┫┃

┃┈┃┈╰━╰━━━━━━╮

╰┳╯┈┈┈┈┈┈┈┈┈◢▉◣

╲┃┈┈┈┈┈┈┈┈┈┈▉▉▉

╲┃┈┈┈┈┈┈┈┈┈┈◥▉◤

╲┃┈┈┈┈╭━┳━━━━╯

╲┣━━━━━━┫

Explanation: oop-