(Table: Units of Output I) Which of the following is correct at 4 units of output? 
Definitions:
Ocean Islands
Ocean islands are landforms that rise from the ocean floor and are not connected to a continent, often formed by volcanic activity.
Similar Environment
Situations or settings that share alike characteristics, including climate, resources, and challenges, possibly influencing organismal adaptations or behaviors.
Mitochondrial DNA
Genetic material found in mitochondria, the energy-producing organelles of cells, passed almost exclusively from mother to offspring.
Common Ancestor
A concept in evolutionary biology referring to the most recent ancestral form or species from which two different species evolved.
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