The question asks about the preferred habitat of the Pygmy Hog. To answer this, one needs to recall the ecological requirements and natural environment of this critically endangered species.
B) Tall 'terai' grasslands — The Pygmy Hog is endemic to the tall, dense grasslands of the Terai region at the base of the Himalayas, particularly in Assam, India. These grasslands provide them with shelter from predators, food (roots, tubers, insects, small rodents), and a suitable environment for breeding.
The question asks to identify the region in India that features a unique combination of three distinct forest types: mangrove, evergreen, and deciduous. This requires knowledge of the geographical distribution of these forest types across India.
Correct Option: D) The Andaman and Nicobar Islands are known for their rich biodiversity and diverse ecosystems. They receive high rainfall, supporting tropical evergreen forests. Being islands, they have extensive coastal areas and creeks, which are home to well-developed mangrove forests. Furthermore, some parts of the islands also feature tropical moist deciduous forests, creating a unique combination of all three forest types.
This question tests knowledge about species conservation, specifically focusing on parasites whose survival is directly linked to their host species. The concept of co-extinction or co-endangerment is key here, where the fate of one species is tied to another.
Correct Option: B) Pygmy Hog-sucking Louse
The Pygmy Hog-sucking Louse (Haematopinus oliveri) is a highly specialized parasite that lives only on the Pygmy Hog. Since the Pygmy Hog is critically endangered, its parasite, the Pygmy Hog-sucking Louse, is also critically endangered due to the severe decline in its host population. This is a clear case of co-extinction risk.
The question asks about the primary threat to the Andaman Shrew. To answer this, one needs knowledge about the specific conservation challenges faced by this particular species, which is often linked to its habitat and geographical location.
B) Tsunamis and logging are considered the primary threats to the Andaman Shrew. The Andaman Islands are highly susceptible to tsunamis, which can devastate coastal and forest habitats. Logging activities also lead to significant habitat destruction and fragmentation, directly impacting the shrew's survival.
The question asks us to identify the correct statements regarding the 'Changpa' community of India. We need to evaluate each statement based on geographical location, their primary occupation, and their official classification.
B) 2 and 3 only
Based on our evaluation, statements 2 and 3 are correct, while statement 1 is incorrect.
The question asks to identify which of the given birds are commonly seen stalking alongside cattle to feed on insects disturbed by the cattle's movement. This describes a commensalistic relationship, where one organism benefits and the other is neither harmed nor helped. We need to evaluate each bird species based on its known feeding habits and association with livestock.
B) 2 only. The Common Myna (Acridotheres tristis) is a highly adaptable and common bird found across various habitats, including agricultural fields and grasslands. They are well-known for their commensal relationship with grazing animals like cattle, where they feed on insects disturbed by the animals' movement. This behavior is a classic example of commensalism.