Sneak next to a Sculk Sensor without triggering it

Use a saddle to ride a pig, then have the pig get hurt from fall damage while riding it.

Gain the trust of an Ocelot.

Cook and eat a pork chop.

Eat a Notch Apple.

Befriend five wolves.

Kill the Wither.

Kill a Mob while wearing the same type of Mob Head.

Harvest some leather.

Acquire diamonds with your iron tools.

Use planks and sticks to make a pickaxe.

Free fall from the top of the world (build limit) to the bottom of the world and survive