Final answer:
The height of a giraffe is determined by a combination of genetics and environmental factors.
Step-by-step explanation:
The height of a giraffe is determined by a combination of genetics and environme ntal factors. Genetics play a role in determining the potential height range that a giraffe can reach. However, environmental factors such as nutrition, habitat conditions, and access to resources also influence the actual height that a giraffe can achieve. Therefore, option c) Determined by a combination of genetics and environmental factors is the correct answer.