Question

which of the following is an environmental indicator of acid deposition? decreased eutrophication of aquatic ecosystems increased photosynthesis from the breakdown of leaves increased water vapor over vegetation and crops decreased ph levels in lakes, rivers, or other bodies of water

Explanation:

To determine the environmental indicator of acid deposition, we analyze each option:

1. "Decreased eutrophication of aquatic ecosystems": Eutrophication is related to nutrient enrichment, not acid deposition, so this is incorrect.
2. "Increased photosynthesis from the breakdown of leaves": Acid deposition harms plants, and leaf breakdown doesn't increase photosynthesis in this context, so this is incorrect.
3. "Increased water vapor over vegetation and crops": Acid deposition doesn't directly cause increased water vapor over vegetation; this is unrelated, so incorrect.
4. "Decreased pH levels in lakes, rivers, or other bodies of water": Acid deposition (like acid rain) increases the acidity of water bodies, which means a decrease in pH (since lower pH is more acidic). This matches the effect of acid deposition.

Answer:

D. Decreased pH levels in lakes, rivers, or other bodies of water