Which dance position involves bent knees and arms extended at right angles?

The dance position that involves bent knees and arms extended at right angles is indeed a plié. In a plié, the dancer bends their knees while keeping the heels on the ground, which aids in developing strength and flexibility in the legs. The arms being extended at right angles is a common position that adds to the aesthetic of the movement, enhancing balance and form.

Pliés are fundamental in various styles of dance, particularly ballet, as they serve as a basis for many other movements and techniques. By mastering the plié, dancers learn to control their body movements, which is essential for executing more complex steps that require precise coordination and strength.

The other options involve different body positions and movements: relevé involves rising onto the balls of the feet; arabesque is characterized by one leg extended behind while the arms are held in various positions; and tendu consists of sliding the foot along the ground to a pointed position without lifting the toe. Each position has its unique characteristics and benefits but does not embody the specific element of bent knees and arms extended at right angles as seen in plié.