Fact 1: Planting trees has a positive impact on an ecosystem.

Fact 2: Some trees are maples.

Given the two facts above, answer the question "what can be planted to have a positive impact on the ecosystem?" with the following options: 
- maples
 - Species
 - plants
 - soil
 - seeds
 - animals
 - Echinoids
 - mushrooms


 

 maples        