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. Given these facts, the looseness of soil has a positive impact on what plant part and growth in that soil. among the following options:
- Roundworms
 - Top soil.
 - Earthworms
 - Veins and arteries.
 - agriculture
 - peachleaf willow
 - Plant silk leaves.
 - Leaves fallen on the ground


 

    Veins and arteries.     