Shrubs can be either evergreen or deciduous. They are separated from trees by their shorter height, that is, less than 6 to 10 meters, and multiple stems.
Option C:
The leafy green or flowering parts of a plant, either dried or fresh are herbs.
They are seed-producing biennial, annual, or perennial, which does not give rise to persistent woody tissue, however, die down at the termination of a growing season.
The herbs do not possess thick and hard woody stems.
Final answer: The trees possess thick, hard, and woody stems.