Touch is said to be attribute of the wind; taste of water; form of light. Sound originate from ether, and scent is the property of earth.
वायोः स्पर्शो रसोऽङ्ग्यश्च ज्योतिषो रूपमुच्यते। आकाशप्रभवः शब्दो गन्धो भूमिगुणः स्मृतः॥