Question

what type of bond causes the kink in the tails of unsaturated fats? single bond triple bond double bond

Explanation:

Unsaturated fats have one or more double bonds in their fatty acid tails. Double bonds introduce a kink because they restrict rotation around the bond, unlike single bonds (which allow free rotation, keeping tails straight in saturated fats) or triple bonds (rare in fat tails). So the bond causing the kink is a double bond.

Answer:

Double Bond