The correct answer is a nutrient runoff.
Nutrient runoff is a major reason for eutrophication of surface waters, in which extra amount of nutrients, generally phosphorus or nitrogen, instigate growth of algae. Sources of nutrient pollution involve surface runoff from pastures and farm fields, emissions from combustion, and discharges from septic tanks.
<span>The uncovered fossils of fish and palm trees shows that Earth’s environment has changed. Due to climate change, animals and trees have adapt to it over time. Researchers have found that tropical fish species are likely to leave their homes and populate in cooler waters as the world heats. And the palm trees were found that have grown in Antartica because of the change in temperature.<span>
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A food chain follows one path of energy and materials between species. A food web is more complex and is a whole system of connected food chains. In a food web, organisms are placed into different trophic levels. ... Producers are the basic trophic level while top predators are the peak level.
