In the following questions, there is a relationship between the letters / numbers / figures on the left of the sign (: :). The same relationship exists to the right of the sign (: :), of which one is missing. Find the missing term from the given alternatives.
F E A L : L E A F : : E A K T : ?
1. K A T E
2. T A K E
3. K E T A
4. E T A K