Type the correct answer in the box. Spell all words correctly.What happens when nutrient levels become too concentrated in rivers, lakes, and oceans? When nutrient levels get too high, water quality degrades and oxygen levels are depleted through a process known as .

Eutrophication, part of the natural ageing process for bodies of water such as ponds or lakes, occurs due to a build-up of nitrates and phosphates over time. These compounds, often found in fertilisers, are plant nutrients that stimulate the growth of plants and algae in the water. As the amount of plant matter in the pond increases, more plants start to die off. Bacteria that decompose the dead plants also consume the oxygen in the water, so fish and other water animals soon die for lack of oxygen. The pond eventually becomes choked with plant matter and grows shallower. Ultimately, as shrubs grow where water once was, the pond dies.Which organisational structure does this text primarily use?

Water would become polluted due to biodegradable waste content in it. During the decomposition of the waste, the oxygen naturally dissolved in water would be:Question 14Select one:A.All of the optionsB.Used up by the decomposing wasteC.In high demand in the BOD- Oxygen Biological DemandD.starved to the aquatic lifeE.Depleted

Over nourishment of water bodies due to excessive nutrients is called-

___________ occurs when substances are dissolved in water that percolates through soil.Question 3Answera.oxbow lakesb.large channelc.Leachingd.Gorges

Absence of decomposers in the environment will lead toa.nature will be replenished of nutrientsb.clean environmentc.litter all aroundd.more number of producers