Here is the full solution for CraftConnections Day 6. Each group is shown with its difficulty colour and a redundant shape, so it stays readable if you are colour blind.
Classic — Day 6
● Shovels Golden Shovel · Diamond Shovel · Stone Shovel · Wooden Shovel
▲ You mine these with an axe Composter · Lectern · Spruce Log · Cherry Shelf
◆ Blocks that hold your stuff Shulker Box · Dropper · Smoker · Dispenser
★ Crafted with gold Clock · Block of Gold · Netherite Ingot · Golden Chestplate