Can someone simply explain what hyponatremia is

hyponatremia

Explanation:

Hyponatremia is a low sodium concentration in the blood. It is generally defined as a sodium concentration of less than 135 mmol/L (135 mEq/L), with severe hyponatremia being below 120 mEq/L. Symptoms can be absent, mild or severe. ... Severe symptoms include confusion, seizures, and coma.

i think that d. wind is the answer.   i missed the question when i answered a. currents.