Answer
a.species at risk of extinction
b.restoration ecology
c.bioremediation
d.zoned reserves
Work Step by Step
a.One of the aims of conservation biology is to conserve the species which are at risk for extinction.
b.Restoration ecology deals with ways in which degradation to the ecosystems can be reversed.
c.Bioremediation refersto the use of microbes to remove or neutalize the environmental pollutants.
d.Zoned reserves are land areas that are undisturbed and protected from human alterations.