As mentioned in the lines "
The very survival of mankind depends upon the survival of wildlife forests... Destruction of wildlife should be made a criminal offence... Secondly, we should involve the local people in the protection of wildlife in protected areas ...No one knows the local flora and fauna better than these people..."Hence option D is correct.
Option A: 'People' are not included in 'flora and fauna'.
Option B: Similarly, 'minerals' are also not included.
Option C: This line is too broad in meaning.
Hence options A, B and C are wrong.