In high light intensity, chloroplasts show:
B fits best: Avoidance response. Keep the Phototropin+All basics straight and Avoidance response stands out as the precise answer. Avoid: A) Accumulation response; C) Dark positioning; D) No movement. Light and flowering items often hinge on which photoreceptor or day-length rule is in play.
Ref: Best CSIR NET Plant Physiology books: Master Unit 6 with Taiz & Zeiger and Salisbury & Ross. Crack Part C experimental questions with top textbooks.