Explanation:

Both statements are correct.

• India’s delegation, led by the Union Ministry of Environment, Forest and Climate Change, will participate in the United Nations Convention to Combat Desertification (UNCCD) COP16 in Riyadh and showcase its Aravalli Green Wall Project. 

• The project is a major initiative of the Environment, Forest and Climate change to green the 5 km buffer area around Aravalli Hill.

• It is part of the Union Environment Ministry's vision to create green corridors across the country to combat land degradation and desertification.

• The project covers the states of Haryana, Rajasthan, Gujarat and Delhi - where the Aravalli hills landscape span over 6 million hectares of land.

• The project will involve planting native species of trees and shrubs on scrubland, wasteland and degraded forest land, along with rejuvenating and restoring surface water bodies such as ponds, lakes and streams.

• The project will also focus on agroforestry and pasture development to enhance the livelihoods of local communities.

Hence option 3rd is correct.