Explanation:

- Reni Village in Garhwal is famous for the Chipko Movement (Option 2).

- Let’s get into why: In 1973, villagers, especially women led by Gaura Devi, hugged trees to stop them from being cut. This protest sparked a bigger movement to protect forests in India.

- Here’s a quick run-down of the other options:

- Option 1, Save Silent Valley Movement—that happened in Kerala in the 1970s-80s, aimed at saving a tropical rainforest from a dam project.

- Option 3, Jungle Bachao Andolan—this started in the 1980s in Bihar/Jharkhand, about protecting forests from commercial exploitation.

- Option 4, Appiko Movement—that’s basically the southern version of Chipko, in Karnataka during the 1980s.

So, the right choice is Option 2: Chipko Movement.

Reni Village and Chipko have become synonymous with grassroots environmental action in India.