<h2>
Answer:</h2>
<h3><u>Pollution, overfishing</u></h3>
<h2>
Explanation:</h2>
- Pollution, overfishing, destructive fishing practices using dynamite or cyanide, collecting live corals for the aquarium market, mining coral for building materials, and a warming climate are some of the many ways that people damage reefs all around the world every day.
<h3>#CarryOnLearning</h3>
The subject is the guitar. So, A would be the appropriate answer.