Which example represents an abiotic factor in an aquatic ecosystem

This question lacks options, options are: A. Water lilies float on top of a pond

B. A population of bass is living in a lake

C. Dragonflies feed on small insects near a pond

D. The pH of a lake is decreased by acid rain

The correct answer is D.  

Explanation:

An aquatic ecosystem is a water-based environment. Abiotic factors are the non-living components that form the environment in which organisms subsist in a current. The main abiotic factors in the marine environment are: light, temperature, salinity, and hydrostatic pressure.Without pollution or acid rain, most lakes and streams would have a pH level of around 6.5. However, acid rain has caused many lakes and streams to have much lower pH levels. Acidification of inland waters consists of reducing their ability to neutralize acids. When acid rain is deposited, it can fall directly into bodies of water or reach them through the dragging of the rain on the ground or its percolation. This process causes the acidification of streams, rivers, lakes and groundwater, altering the balance of water ions and again, increasing the content of aluminum and other heavy metals from their mobilization in water beds. The hydrological cycle explains the effects of acid rain, but even more so, on water bodies. Acid precipitation washes the metals contained in the soil or the sediments of the hydrographic basins and separates particles of soluble materials, discharging these metals into lakes and other bodies of water. The most important effect of acid rain on aquatic systems is the impact on fish populations by toxic metal poisoning, which generates serious effects on trophic chains with consequences on the fishing economy and health problems caused by magnification ( accumulation of toxins in organisms with increasing trophic levels).

I think the answer would be Water. This is because all the other answers are living. I hope this help you guys!!!