Answer:
When the water gets too warm, the algae can no longer live inside corals, so they leave. The corals then turn from green to white, called coral bleaching. Climate change has been causing the Earth's air and oceans to get warmer. With warmer oceans, coral bleaching is becoming more widespread.
Explanation:
All of the above are correct.
D phytoplankton i believe
To show he presence of a trait you would need to follow it through multiple generations in a pedigree.
