Fact 1: Roots grow in length and width from primary and secondary meristem.

Fact 2: Growth in girth is caused by other meristems, called secondary meristems.

Given the two facts above, answer the question "What grow in length and girth caused by meristems?" with the following options: 
- roots
 - ferns
 - legumes
 - Trees
 - plants
 - Flowers
 - bushes
 - bamboo


 

 roots        