The answer contrasts mechanical and chemical exfoliation methods based on the given clues.
Mechanical exfoliation: (a) removes dead skin by manipulation with the fingertips, (d) use of honey and jojoba beads with fingers, (f) rotary brush, (g) rice bran to polish away dead cells.
Chemical exfoliation: (c) enzyme, (e) alpha hydroxy acids, (h) salicylic acid.
Therefore, based on the clues provided, mechanical exfoliation includes actions like manipulation with fingertips or use of rotary brushes, while chemical exfoliation involves enzymes, alpha hydroxy acids, and salicylic acid.
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