Pls help i dont understand :( will give Brainliest + 25 points!!

When lactate builds up in a runners muscles it causes a burning sensation what causes this to occur

Eutrophication caused by human nutrient pollution.

Which of the following is most likely the result of an organism having lipids in its body a) water cannot be absorbed through the surface of a leaf b)human eats fruits to get a quick source of energy c) a sheep sleeps for more hours in the winter d) a warm river is filled with fish and algae