The key to verbal analogy practice is naming the relationship before looking too hard at the options. In this question, seed and tree are connected by development: the first can grow into the second. Once you name that relationship, the second pair becomes easier. A spark can grow into a flame, so flame is the best answer.
Many analogy questions include tempting distractors from the same topic area. Smoke, ash, match, spark, and flame all belong to the world of fire, but topic similarity is not enough. The answer must preserve the exact relationship. If the first pair is part-to-whole, cause-to-effect, tool-to-use, synonym, antonym, or degree, the second pair must follow that same pattern.
Verbal analogies help IQ-style tests measure flexible language reasoning rather than memorized facts. You do need to understand the words, but the real skill is comparing relationships cleanly. IQ Snap mixes verbal prompts with pattern, number, and logic questions so your result reflects several reasoning modes. Use this free sample as a warm-up, then take the full test for instant percentile-style feedback.