Influenza (also known as flu) is a contagious respiratory illness caused by flu viruses. It can cause mild to severe illness, and at times can lead to death. Flu is different from a cold. Flu usually comes on suddenly.
Nobody really it just developed <span>from Old Norse uggligr which means ‘to be dreaded, and from ugga ‘to dread.’ and they finally made ugly</span>
They are important because they contribute to clean air and water for 500 million people this is because they help sustain a healthy forest
It can become an ion because it can lose or gain an electron. It can become a part of molecule because it can form covalent bond with other atoms to gain a full valence shell.
Answer:
from precipitation, oceans lakes streams and soil
