Answer:
i think it's c
Explanation
I'm pretty sure but not positve sorry if it's wrong :3
Il Duomo di Firenze<span>, as it is ordinarily called, was begun in 1296 in the </span>Gothic<span> style with the design of </span>Arnolfo di Cambio<span> and completed structurally in 1436 with the dome engineered by </span>Filippo Brunelleschi<span>.</span>
I think it is A. Natural Sculpture, because your question asks about a type of environment sculpture, so pretty sure it is natural from the environment. Hopefully it is right :)