English ivy is a plant that has the ability to grab onto objects and grow upward to get sunlight. This ivy can also be found growing flat along the ground. What causes the variation in the ivy growth?


A. The ivy grows according to how its parents grew, and ivy that grows upward must be a different species than ivy that grows along the ground.
B. The ivy grows where it will be able to blend into its environment to avoid predation.
C. The ivy grows where it will receive the least amount of sunlight for photosynthesis.
D. The ivy grows according to its environment, and ivy that grows upward has things nearby to climb, while ivy that grows on the ground does not.