Correct Option
The passage explicitly states that the disruption of continuity in forested landscapes and corridors adversely affects extinction-prone wildlife species and poses a significant threat to biodiversity conservation. Consequently, maintaining this continuity directly serves the purpose of preserving biodiversity.
Incorrect Options
Options 2 and 3 are incorrect because the passage identifies mining, highways, and grants of forest lands for such activities as causes of habitat fragmentation, which is detrimental to forest continuity. These actions represent human interventions that lead to the degradation of forests, rather than objectives for their continuous maintenance.