Answer:
The correct answer is back lighting.
Explanation:
Light direction is the primary direction of the light which can hit the flower.
Backlighting is a design technique which helps the flowers shine in a garden using sunlight during sunrise or sunset or in photo-studio labs.
This technique helps to emphasize the transparency of the petals when intense light is used for most of the flowers while soft and low light for a few flowers. In gardens also during the golden hours of the day, this technique is helpful.
Thus, backlighting is the correct answer.