Final answer:
Natural light is a necessary and sufficient factor for causing flowers to bloom. The presence of natural light triggers a process called photoperiodism in flowering plants, which determines when a plant flowers.
Step-by-step explanation:
Natural light is a necessary and sufficient factor for causing flowers to bloom. The presence of natural light triggers a process called photoperiodism in flowering plants, which determines when a plant flowers.
Photoperiodism refers to the response of organisms, including plants, to the relative amount of light and dark in a 24-hour period. For many flowering plants, photoperiod is a key determinant of flowering. The exposure to natural light helps develop the plant's ability to respond to specific cues that induce flowering.
Therefore, natural light is both a necessary and sufficient factor for the bloom of flowers.