Answer:
Analogy
Step-by-step explanation:
.Figurative language deviates from the usual word order and meaning in order to convey a complex meaning, vivid writing, clarity, or an emotive comparison.
.A comparison between two ideas, thoughts, or things that are quite unlike to one another is known as an analogy.
.The speaker is drawing a comparison between kids and plants.
.The comparison works well because it makes us consider how much time and effort goes into cultivating plants.
.The speaker makes the analogy that children are like other people in that they require care to develop.
.Hence, the apt figurative language used here is Analogy.
Hope you find it useful.