I believe it’s Chemical energy but please correct me if i’m wrong
HCN is a Bronsted acid; it can dissociate into H+ and CN-. And H+ is a Lewis acid because it accepts election pairs. ... In order for H+ and CN- to be formed, Hydrogen in HCN donates its electrons to Carbon. So in this sense, Hydrogen is the lewis base and Carbon is the lewis acid.
2 is right am 70 percent sure
Answer:
Bombardment by asteroids
Explanation:
All of the other ones explain themselves