Which element is necessary to achieve an extra 0.1 bonus in a routine?

To earn an additional 0.1 bonus in a gymnastics routine, the inclusion of an acrobatic skill is essential. This requirement aligns with the scoring rules that aim to encourage gymnasts to demonstrate a variety of complex skills within their routines. Acrobatic skills typically involve flips, twists, or other dynamic movements that showcase not only the gymnast's strength and control but also their technical proficiency.

While a difficulty level D skill, a jump with a full twist, or a dance element may contribute positively to the overall score and difficulty rating of a routine, they do not specifically guarantee the bonus that comes from including an acrobatic skill. The focus on acrobatics is vital in ensuring that the gymnast demonstrates a comprehensive range of abilities, thereby effectively enhancing their performance's overall value.