You are presented with the question "What is transported by sticking to the fur of an animal?" and the following answer choices: 
- burrs
 - food
 - keratin
 - caviar
 - A virus
 - fish
 - eggs
 - lipids

Now knowing that 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, choose the best answer.


 

 burrs        