Most plants continue to grow throughout their lives.
Lilies continually produce new bulbs, from which grow new plants.
Lilies continue to grow throughout their lives.
What continues to grow throughout their lives? 

A. potatoes
B. Hemoglobin
C. tortoises
D. plastic  roses.
E. Human teeth.
F. Lilies.
G. Silk daisies.
H. vegetation