You are presented with the question "The looseness of soil has a positive impact on what plant part and growth in that soil." and the following answer choices: 
- Roundworms
 - Top soil.
 - Earthworms
 - Veins and arteries.
 - agriculture
 - peachleaf willow
 - Plant silk leaves.
 - Leaves fallen on the ground

Now knowing that the looseness of soil has a positive impact on a plant 's roots' growth in that soil and roots are the veins and arteries of the plant, choose the best answer.


 

    Veins and arteries.     