Final answer:
Semi-permanent hair color penetrates and deposits color in the hair shaft without lifting the natural pigment, providing a natural look that washes out over time. Option c is correct.
Step-by-step explanation:
The type of hair color that penetrates the hair shaft and is formulated to deposit but not lift color is Semi-permanent color.
Semi-permanent color is designed to wash out over a few weeks, typically four to six, which makes the transition of roots less noticeable.
Unlike permanent hair color which chemically alters the hair's structure, semi-permanent hair color allows for subtle variations and a more natural look without making significant changes to the hair's natural pigment.
It does not contain the chemicals required to radically change the color, and therefore, cannot lighten hair as only bleaching agents can achieve that.
Hence, option c is correct.