Which example best describes the influence of genetic factors

A. A shrub with good access to sunlight is taller then other shrubs located in shaded areas
B. The adult offspring of a pair of deer is shorter than its parents and obtained fewer nutrients when it was younger
C. A corn plant is the same height as another corn plant of a different variety
D. A horse is the same size as its parents and similar height to other horses of the same breed that it lives with on a farm

D. A horse is the same size as its parents and similar height to other horses of the same breed that it lives with on a farm

This example best describes the influence of genetic factors, as the offspring (the horse in the example) is similar in size to its parents, which suggests that genetics play a significant role in determining its size. Additionally, the fact that it has a similar height to other horses of the same breed on the farm further implies that the breed's genetic makeup influences height, rather than just the environment alone.