Answer:
The correct answer is option A, sprout from seeds after a forest fire
Step-by-step explanation:
Pioneer species are basically the first species that grow or re-originate in any area after a disturbance. Disturbances may include forest fires, floods, etc.
Here in this questions, in option A, seeds are sprouting after forest fire. Forest fire is a disturbance and seeds sprouting just after a disturbance can be considered as pioneer species of plant.