Answer:
Answer is Earthquakes :)
Explanation:
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Gymnosperms; naked seeds. Referring to the unenclosed condition of the seeds, as when they are produced they are found naked on the scales of a cone.
Angiosperms; flowering plants. Referring to the use of flowers, which contains a carpel as the basic unit of the female reproductive organ.
The correct answer is:
Codominance
Organism called symbiont and phenomenone is symbiosis