Correspondences are objects whose vibrations and characteristics are compatible with the energy of a chakra. That relationship creates a synergy that can be used to balance chakra energy like a pitch fork is used to tune a piano. Here are some examples of Root chakra correspondences.
COLOR:
Red represents vitality, courage, passion, and life force.
ELEMENT:
Earth represents stability, renewal, and grounding.
SYMBOL:
A four-petaled lotus where each petal represents a different aspect of the self: mind, body, emotions, and consciousness, all grounded in the physical plane.
PHYSICAL:
Spine, legs, feet, bones, immune system, and adrenal glands.