The liver secretes a substance which helps to get the fatty parts of the food to dissolve in water so that they can be more easily broken down. This substance is called

bile

Explanation:

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metamorphism is the change of minerals or geologic texture (distinct arrangement of minerals) in pre-existing rocks (protoliths), without the protolith melting into liquid magma (a solid-state change). the change occurs primarily due to heat, pressure, and the introduction of chemically active fluids. i hoped i !

i think that d. wind is the answer.   i missed the question when i answered a. currents.