Make a critical assessment of the Paris Agreement as an international instrument to deal with the challenges of climate change, and enlist the opportunities and constraints for its implementation in developing and least developed states.  

You need to read as broadly as possible but for some guidance see these links on the question above;

https://unfccc.int/sites/default/files/english_paris_agreement.pdf

https://www.oecd.org/mcm/documents/C-MIN-2018-12-EN.pdf

http://unfccc.int/resource/docs/2015/cop21/eng/10.pdf#page=30

http://unfccc.int/meetings/bonn_may_2016/meeting/9413.php

http://unfccc.int/science/ workstreams/cooperation_with_the_ipcc/items/9535.php

http://newsroom.unfccc.int/lpaa/renewable-energy/africa-renewable- energy-initiative-increasing-renewable-energy-capacity-on-the-african-continent/,