Fact 1: Most plants continue to grow throughout their lives.

Fact 2: Bamboos are vigorous, rugged plants.

Given the two facts above, answer the question "What continues to grow throughout their lives?" with the following options: 
- flour
 - bamboo
 - ovaries
 - harvested wheat
 - cats
 - flowers
 - potatoes
 - tortoises


 

  bamboo       