The Chipko Movement started in the Garhwal Himalayas in the early 1970s. It was a nonviolent protest against the deforestation of the region. The movement was led by women who hugged trees to prevent them from being cut down. The Chipko Movement was successful in stopping deforestation in many areas and it is considered to be one of the most important environmental movements in history.
The correct answer is (a) Tehri. Tehri is a town in the Garhwal Himalayas in the Indian state of Uttarakhand. It is the headquarters of Tehri Garhwal district. The Chipko Movement started in the village of Reni in Tehri Garhwal district in 1973.
The other options are incorrect. Chamoli is a district in the Garhwal Himalayas in the Indian state of Uttarakhand. Uttarkashi is a district in the Garhwal Himalayas in the Indian state of Uttarakhand. Almora is a district in the Kumaon Himalayas in the Indian state of Uttarakhand.