The purpose of offshore islands is focussed for site or landscape restoration to

Correct option is B

Introduction
· Offshore islands serve as critical refugia in conservation biology, acting as isolated sanctuaries for vulnerable species.
· Restoration of these islands often involves the complete eradication of invasive species to recreate a "predator-free" environment.
· These sites are strategically used to prevent the extinction of species that cannot survive on mainland areas due to intense predatory pressure.
Sol. Foster populations of endangered species without native or introduced predators is the primary restoration focus for offshore islands.

Information Booster
· Predator-free status is the most vital characteristic of restored offshore islands, allowing for the successful "translocation" of critically endangered species.
· These islands act as biological insurance policies, protecting a subset of a species' population from mainland threats like disease outbreaks or habitat loss.
· Island restoration often requires "ecological integrity" where the entire food web is restored to its pre-human-interference state.
· They are particularly famous in countries like New Zealand and Australia for the protection of flightless birds (e.g., Kakapo) that have no defense against mammalian predators.
· The isolation of these islands ensures that once predators are removed, the risk of "re-invasion" is significantly lower than in fenced mainland sanctuaries.

Additional Information
· Linkage and genetic interchange are typically the focus of "wildlife corridors" or "stepping stones" on the mainland; offshore islands are actually characterized by their isolation, which limits natural genetic exchange.
· Availability of habitats is a general goal of all restoration projects, but it does not capture the specific, unique advantage of "predator exclusion" that offshore islands provide.
· Stabilization of surface cover refers more to soil conservation and erosion control on terrestrial landscapes (like slopes or mines), while "animal corridors on land" are conceptually opposite to the isolated nature of offshore islands.