The picture below shows Earth's interior layers. Which of the following is true about Layer 4? (1 point) Responses All solid; part of the crust. All solid; part of the crust. Partially liquid magma; part of the mantle. Partially liquid magma; part of the mantle. All solid; part of the mantle. All solid; part of the mantle. Partially liquid magma; part of the crust.