A dense population of plants is growing at the bottom of a farm pond. What will most drastically affect the rate of photosynthesis completed by the plants?

emerald ash borer

the emerald ash borer is a green buprestid or jewel beetle native to north-eastern asia that feeds on ash species. females lay eggs in bark crevices on ash trees, and larvae feed underneath the bark of ash trees to emerge as adults in one to two years. hope this !