Fact 1: The looseness of soil has a positive impact on a plant 's roots' growth in that soil.

Fact 2: Air exchange in the root zone is essential for root growth.

Given the two facts above, answer the question "What can enhance a plant's growth?" with the following options: 
- sunlight
 - tight soil
 - Energy.
 - loose soil
 - Enzymes
 - compacted roots
 - energy
 - compact soil


 

    loose soil     