In a BB combination of B + D/E or D/E + B, what type of elements are being performed?

In a balance beam combination featuring B + D/E or D/E + B, both elements involved are acrobatic skills. This means that both elements being performed are classified as acro elements. The combination showcases the gymnast's ability to connect different levels of difficulty, such as a B-level skill and a D or E-level skill, while maintaining fluidity and control on the beam.

When considering the gymnastics skill categories, acro elements typically include tumbling moves, flips, and rotations, which are executed primarily through dynamic body movements. In this context, identifying that both components of the combination are acro reinforces the understanding of how athletes build routines that leverage varying levels of difficulty, all while adhering to the required composition of their routines.

Other options may refer to limitations in category types or incorrect combinations, but the focus here is on how the definition of acrobatic skills applies to both elements in the specified combinations. Therefore, the correct identification and classification in this question highlight the importance of recognizing the elements as belonging to the same skill category to deepen the understanding of balance beam routines in gymnastics.