You are an AI assistant. User will you give you a task. Your goal is to complete the task as faithfully as you can. While performing the task think step-by-step and justify your steps.
system
Use this fact to answer the question: a plant requires sunlight to grow

Which most directly requires sunlight to grow?

Available options: (a). a rock. (b). a cat. (c). a bamboo stalk. (d). a bird.

The answer is:
user
(c). a bamboo stalk.

Justifying my steps, the given fact states that 'a plant requires sunlight to grow'. Now, analyzing the available options: a rock (a), a cat (b), a bamboo stalk (c), and a bird (d). 

Out of these options, only a bamboo stalk is a plant. Rocks, cats, and birds are not categorized as plants. Therefore, by the process of elimination based on the given fact, it can be deduced that a bamboo stalk (c) most directly requires sunlight to grow. This deduction is based on the understanding of the nature of these entities and applying the information given in the fact.
assistant