Which of the following is a key element of Raja yoga?

Raja yoga, often referred to as the "royal" path of yoga, places a strong emphasis on meditation and the cultivation of a focused, concentrated mind. Concentration is considered one of the foundational practices in Raja yoga, as it enables practitioners to still their thoughts and reach deeper states of awareness.

In Raja yoga, concentration is developed through various techniques, including meditation and mental focus exercises, which are essential for attaining higher states of consciousness. This focus helps practitioners deal with distractions and allows them to engage more fully with their inner selves, facilitating personal growth and self-realization.

While chanting, postures, and mindfulness may play supportive roles in the overall practice of yoga, they are not the central element of Raja yoga, which is specifically centered on mental discipline and the refinement of attention. Thus, the emphasis on concentration aligns perfectly with the core principles of Raja yoga.