The correct answer to this question is Twig. A finger is the limb attached to the hand. It is the organ which allows sensation and manipulation of the hand. Fingers are what allows us to feel. A twig is a shoot growing from a branch. Twigs are important because they allow nesting places for birds and they fill the soil with nutrients.
There are two types of twigs. The first is a vegetative twig. The second is fruiting spurs which branch off the size of branches. A twig's age can be known by counting the annular ring marking or bud scale scars down the twig.