Each point: 1 Mark
1) The boundaries of national parks are well marked, whereas the boundaries of wildlife sanctuaries are often not well marked.
2) All human activities are completely banned in the area under the national parks, whereas in wildlife sanctuaries, some human activities like timber extraction, forestry and cultivation are allowed, provided they do not have a direct adverse impact on the wildlife.
3) In wildlife sanctuaries, private ownership rights can continue as long as wildlife conservation is not adversely affected, but in the national parks, there are no private ownership rights.