Cultural heritage and natural history of a nation has a very high value and is unique. ... Culture and its heritage reflect and shape values, beliefs, and aspirations, thereby defining a people's national identity. It is important to preserve our cultural heritage, because it keeps our integrity as a people.
Your answer is B. Hopes this helps
During presentations, speakers show their prowess by knowing the content well.
I think this word best fits the sentence. Prowess is about an ability of the person and based on the sentence the speakers try to prove something about understanding the content.
