Answer:
Option 2, Conserving ecosystems and remediating pollution
Step-by-step explanation:
Conservation biology is a management technique to protect species and their habitats and ecosystems. It also assures conservation of biotic interactions and reduction is rates of extinction. On the other hand, ecology restoration deals with repairing of disturbed ecosystems through human intervention.
Conservation ecology on one hand prevents ongoing degradation and restoration ecology on the other hand reverse such degradation .
Hence, option 2 is correct