Explanation:

- Option 1: Sumaira Abdulali: She is an Indian environmentalist known for her active campaigns against illegal sand mining and promoting sustainable environmental practices.

- Option 2: Rajendra Singh: Known as the "Waterman of India," he is an environmentalist renowned for his efforts in water conservation and revival of rivers.

- Option 3: Jadav Payeng: Often called the "Forest Man of India," Jadav Payeng is celebrated for his forestation efforts on the riverine island of Majuli, turning barren land into lush forest.

- Option 4: Anil Prakash Joshi: An environmentalist recognized for his contributions to rural development and his advocacy for environmental sustainability and social justice.