Sentence Correction

Originally developed by ancient Hawaiians, surfing appeals to people due to the sport’s unusual confluence of adrenaline, skill, and high paced maneuvering, an unpredictable backdrop that is, by turns, graceful and serene, violent and formidable, and the camaraderie that often develops among people in their common quest to conquer nature.

1 surfing appeals to people due to the sport’s unusual confluence of adrenaline, skill, and high paced maneuvering, an unpredictable backdrop that is, by turns, graceful and serene, violent and formidable, and the camaraderie that often develops
2 surfing’s appeal is its unusual confluence of adrenaline, skill, and high paced maneuvering, an unpredictable backdrop that is, by turns, graceful and serene, violent and formidable, and the camaraderie that often develops
3 surfing’s appeal to people is due to the sport’s unusual confluence of adrenaline, skill, and high paced maneuvering, an unpredictable backdrop that is, by turns, graceful and serene, violent and formidable, and developing camaraderie
4 surfing appeals to people due to the sport’s unusual confluence of adrenaline, skill, and high paced maneuvering, a backdrop that is unpredictable and that is, by turns, gracefully and serenely violent and formidable, and the camaraderie that often develops
5 surfing appeals to people due to their unusual confluence of adrenaline, skill, and high paced maneuvering, an unpredictable backdrop that is, by turns, graceful and serene, violent and formidable, and the camaraderie that often develops


IMO 1


THE question is whether
unpredictable backdrop that is, by turns, graceful and serene, violent and formidable, and the camaraderie

if all the above are adjectives for unpredictable backdroup,
then why
graceful and serence ( why this extra and )

it should be graceful, serene, violent and formidable.... ???