Comprehension Passage

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Birds are under severe stress and strain because of human activities and many of them are facing a threat to their survival. The threats come in various way, such as habital loss and damage to ecosystems, agricultural and industrial activities and issues like pesticides poisoning and effluent discharges, urbanization and to some extent, hunting and pet trade. A study has noted both long-term and recently recorded annual losses. Some species which were categorised as being of "least concern" by the International Union for Conservation of Nature (IUCN) were found to be seriously endangered. There are reasons for "high concern" over 52% of the species which figured in the study. Some geographical areas present greater threats to them than others. Some species which are found in the Western and the Eastern Ghats are fast dwindling. The Western Ghats, a great home for many birds, have seen the numbers of some of them dwindle as much as 75% in the last two decades. The ecological changes in the Terai grasslands in Northern India have adversely affected birds endemic to them and many migratory species.

Amidst the bleak news, one bright spot is about the sparrows which had disappeared from cities but are now found to be stable in numbers in other areas. That shows some resilience but the conditions that helped them to survive may not be available to other birds. Protection of habitats and other steps to save the birds should get high priority. We are yet to realise that the disappearance of birds from nature or the diminution of their numbers will make life difficult for us. Nature and life-forms that it supports are crucially dependent on each other and the link should not be snapped.

Which one of the positive signs in view of these concerns?

1
migration of birds to grasslands
2
climate change for better
3
increase in protective habitats
4
stability of survival in areas other than urban

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