Fact 1: Animals use saturated fatty acids to store energy.

Fact 2: Killer whales are social animals.

Given the two facts above, answer the question "What uses saturated fatty acids to store energy?" with the following options: 
- the Sun
 - peachleaf willow
 - Conifers
 - killer whales
 - perennials
 - generators
 - passenger pigeons
 - light bulbs


 

    killer whales     