Answer:
B). Flower.
Step-by-step explanation:
The authors employ a variety of figurative devices to convey their intended ideas more comprehensively and effectively and comparison is one of the most commonly used device that authors use to clarify or explain the meaning or context associated to a specific word by comparing it to a familiar object/idea or its characteristics.
In the given sentence, the person is being compared to a 'flower' as reflected by the use of word 'blossom'. The author implies to display the effect of humans' absorbed and unhurried behavior and remaining 'intensely whole' by comparing the effect to a 'flower' like which they(humans) would be able to blossom 'out of themselves'. Thus, option B is the correct answer.