The proposed solutions for reducing coral bleaching generally focus on enhancing the resilience of coral ecosystems to environmental stressors. Based on the options you've provided, the commonalities among solutions typically include:
- They both include selectively breeding corals for desirable traits.
- They both include identifying variation in traits.
These choices highlight the strategies of breeding for resilience and identifying beneficial traits that can enhance coral survival and resistance to bleaching events.
The other options do not generally apply as broadly since selectively breeding algae and altering coral DNA through environmental factors may not be common approaches in all proposed solutions.