4 Pics 1 Word Level 1703

Answer:
Crust
Hint
What is the answer to the 4 Pics 1 Word level with Layers of the earth, A Piece of bread, Flat uncooked bread, and A section of the earth?

Hint
What is the answer to the 4 Pics 1 Word level with Layers of the earth, A Piece of bread, Flat uncooked bread, and A section of the earth?