It weakens the immune system making it unable to defend itself against viruses and it also attacks the immune system..
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In the winter its color changes to more resemble their <em>winter</em> surroundings, so they are more white, enabling them to blend in better with their white surroundings. In summer, its color changes to more resemble its <u><em /></u><em>summer</em> surroundings, so they are more brown like the rocks and ground around them.
Answer:
it's a
Explanation:
Earth rotates on its axis once each day, and the gravity of the Moon causes the oceans to bulge. Earth rotates on its axis once each year, and the gravity of the Moon causes the oceans to bulge.
When the two atoms are split
Answer:
Acid rain is caused by emissions of sulphur dioxide and nitrogen oxide, which react with the water molecules in the atmosphere to produce acids.
