The verb that is in the incorrect past tense form is decia because when it says it in the sentence, it would be mé dijo instead.
The answer is decía. Hope this helps! :)
The stigma, which is a reproductive part of the plant where pollen is collected, will close usually within a few seconds of being touched by a pollinator. This prevents further pollen from interacting with the plant unless the stigma reopens, which usually does not occur
