Fact 1: When a plant grows , the size of the leaves of that plant may increase.

Fact 2: Ferns are vascular plants.

Given the two facts above, answer the question "what's leaves may increase as it grows?" with the following options: 
- fern
 - Green
 - grass
 - energy
 - apples
 - Trees
 - edible
 - oak


 

 fern        