To support Sachiko's inference that suppressing or stopping natural fires has negative effects on forests, the following pieces of evidence are relevant:
B. Fires may add nutrients to the soil as organic matter breaks down. E. Occasional exposure to fire lets some trees develop fire resistance.
These pieces of evidence highlight the beneficial effects of fire on forest ecosystems, indicating that natural fires contribute positively to soil health and tree adaptation, thus suggesting that preventing fires can have adverse effects on forest ecology.