Fact 1: All plants have a characteristic life cycle that includes alternation of generations.

Fact 2: All ferns are shade plants.

Given the two facts above, answer the question "What has a characteristic life cycle that includes alternation of generations?" with the following options: 
- humans
 - leaves
 - Oak
 - dogs
 - Trees
 - cacti
 - amoeba
 - ferns


 

        ferns 