[Help related to Minecraft Sponge]

There are several ways to get a wet sponge in Survival mode.

1. Find them Growing in the Ocean Monument. You can add a wet sponge to your inventory in Survival mode by gathering wet sponges that grow naturally in the Ocean Monument (also called Guardian Temple). ...
2. Find and Kill an Elder Guardian.

More information visit - Minecraft Sponge | Minecraft Cartography Table

[Help related to Campfire recipe in minecraft]

1. Get at least three logs from any type of tree.

2. Use the Creation menu to transform one of the logs into four wooden boards and transforming two wooden boards into four sticks. You need at least three sticks to create the fire.

3. Look for a piece of coal in caves or mountains and extract it with a pickaxe.

4. In possession of all the items, use a work table to create a fire.

More information visit at Minecraft Campfire Recipe