We can conserve the birds by :

We can conserve the birds by implementing national and international laws and 
having an understanding of their habitats properly (both A and B).

Endangered birds are the birds whose numbers are diminishing to a level that they might face extinction or disappearance. Other than the individual and society efforts to save these birds, government agencies also take care of the forests and animals. The national and international government lays down rules, methods and policies to protect and conserve them. Wildlife sanctuaries, national parks, biosphere reserves etc., are protected areas for conservation of the habitats of plants and animals present in that area.