Read the given passage carefully and answer the questions that follow.

Roughly four decades back, a gathering of villagers in a secluded hill community of northern India stood firm against timber contractors who had arrived to cut down a dense stretch of woodland. From this act of quiet defiance emerged the Chipko movement, and with it the foundation of organized environmental activism in modern India. A crucial point about Chipko, however, is that it was not an isolated incident. It represented a much broader pattern of conflicts over natural resources throughout the late twentieth century — disputes involving forestland, rivers, grazing grounds, and open-cast mines; opposition to the construction of massive hydroelectric dams; and resistance against the unchecked exploitation of mineral wealth. In every instance, the expansion of industrial cities and centrally-driven economic projects had systematically cut off rural and tribal communities from the land, water, and forest resources that sustained their daily existence.

In Europe and North America, environmental concern had grown primarily from a desire to conserve rare wildlife species and unspoiled wilderness. In India, by contrast, ecological struggle was rooted in the basic question of human survival. This was a movement of the marginalized and the dispossessed — one that bound together the cause of social equity on one side with ____________________ on the other. Its central argument was that dominant patterns of resource extraction pushed vulnerable communities to the edge while simultaneously destroying the ecological systems they depended upon.

During the 1970s, when the Indian government exercised strong central control over the economy and maintained close ideological ties with the Soviet bloc, activists associated with Chipko and similar grassroots movements were frequently labeled by their detractors as foreign-funded troublemakers or enemies of national progress. Yet the relentless momentum of these protests eventually compelled the authorities to respond with tangible measures. By 1980, the central government had established a dedicated Department of Environment, which was subsequently elevated into a full Ministry within a few years. Legislative frameworks addressing industrial pollution and the protection of existing forest cover were introduced. Conversations around reviving traditional community-based management of water bodies and woodland also gained some traction. Simultaneously, researchers and investigative journalists had begun documenting more rigorously the footprint (I) of ecological destruction on the livelihoods of people across the subcontinent. When economic liberalization swept through India in 1991, the loosening of state control was initially seen as a breath of fresh air after years of bureaucratic stagnation. However, the champions of the free market proved, in many respects, even more aggressive in dismantling environmental safeguards than the earlier regime of state-directed development had been.

What was the underlying reason common to all environmental protests that took place across India?