If seeds stick to the fur of an animal then that seed will be transported by the animal, and burrs and some other seeds have tiny barbs that hook on to cat fur. Given these facts, what is transported by sticking to the fur of an animal among the following options:
- burrs
 - food
 - keratin
 - caviar
 - A virus
 - fish
 - eggs
 - lipids


 

 burrs        