The sun creates it's own light, also gives light and life to bunch of stuff like plants,animals,humans etc. photosyntesis is the process of making food which needs sun,water,nutrients etc.
Key is to lock as D. Substrate is to active site.
A benefit of using nuclear energy could be the abundance of uranium in nature. The human risk about mining that is the most important to consider are the health hazards that are associated with uranium mining.
