Which statement is most likely a scientific law? Animals need oxygen because it unlocks the energy contained in food. Colonies of microscopic organisms grow faster in closed spaces because they cannot fly away. The oldest layers of rock lie below newer layers of rock on Earth. Healthy foods taste better than dangerous or spoiled foods.

The oldest layers of rock lie below newer layers of rock on Earth.

Explanation:

Scientific law can be defined as a description of natural phenomenon. The scientific law does not explain the 'why' of occurence of natural phenomenon instead it describes it.

From the given options, the correct statement is that oldest layers of rock lies below the newer layers. It is a scientific law that oldest layer of rocks is covered up with newer layer of rocks. It is a natural phenomenon that occurs in the nature of earth formation.

Thus the correct answer is the third option.