Answer:
The correct answer is option A. "vernalization".
Step-by-step explanation:
Vernalization in plants refers to the induction of flowering as a result of the exposure to prolonged cold of winter, or by artificial means. After vernalization occurs the plant is able to produce flowers, but it may require additional seasons to see them. Vernalization is an independent process of the fall coloration of leaves of deciduous trees, both process are unrelated.