Which of these is a ceremonial dance or challenge in Māori culture in New Zealand?

Traditionally performed by the New Zealand Rugby team before every match. Very intimidating!

they' would feel very threatening in an actual battle situation

Go to YouTube and watch the mass Haka done by the mourners at the funeral of the late, great Jonah Lomu.

RedSeaDiver, That was very touching & emotional. Thank You for that suggestion.

Sloane Ranger, ALL Blacks

I would not just think about the threatening nature to enemy/opponent, it would do wonders to get the participants into the right mindset, or produce adrenaline.

Arohanui, What a great way to greet newcomers, lol. I went to YouTube once to watch some before rugby matches.